Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition Preface Thank you to the colleagues and students who have Audience made this textbook so successful and helped to ensure its staying power in a very competitive textbook niche. This book is meant especially for students who plan to Several people have asked me, with this book doing so pursue such careers as nursing, therapy, health education, well, why I don’t retire from the classroom. The answer medicine, and other health professions. It is designed for is that not only do I find classroom teaching the most ful- a two-semester combined anatomy and physiology course filling aspect of my profession, but also that it is my stu- and assumes that the reader has taken no prior college dents who teach me how to write. I work continually at chemistry or biology courses. I also bear in mind that finding more and more effective ways of getting con- many A&P students return to college after interruptions to cepts across to them, at turning on the light of insight. raise families or pursue other careers. For returning stu- The best ideas for communicating difficult physiological dents and those without college prerequisites, the early ideas often come to mind during my face-to-face inter- chapters will serve as a refresher on the necessary points actions with students, and many are the times that I have of chemistry and cell biology. dashed back from the lecture room to the drawing pad or Many A&P students also are still developing the keyboard to sketch concepts for new illustrations or intellectual skills and study habits necessary for success write down new explanations. Grading exams and in a health science curriculum. There are many, too, for homework assignments also continually gives me new whom English was not their original language. Therefore, impressions of whether I have effectively taught an idea I endeavor to write in a style that is clear, concise, and through my writing. Thus, my students are my unwitting enjoyable to read, and to enliven the facts of science with writing teachers. This pertains also to the students in my analogies, clinical remarks, historical notes, biographical “extended classroom”—students worldwide who use vignettes, and other seasoning that will make the book the book and write to ask my help in understanding dif- enjoyable to students and instructors alike. Each chapter ficult concepts. is built around pedagogic strategies that will make the sub- What are the improvements in this edition? I con- ject attainable for a wide range of students and instill the tinue to aim for ever-better clarity, brevity, currency, and study and thinking habits conducive to success in more accuracy. Physiology, especially, is a complex subject to advanced courses. explain to beginning students, and I am always working in both the lecture room and textbook to find clearer ways to explain it. Physiology also is a fast-growing field, and it’s a challenge to keep a book up to date without it grow- How We Evaluated Your Needs ing longer and longer. After all, our lecture periods and semesters aren’t getting any longer! So, while updating This book has evolved through extensive research on the information, I have looked for ways to make my discus- needs and likes of A&P students and instructors. In devel- sions more concise in each edition. I also continue to cor- oping its three editions so far, we have collected evalua- rect errors as students and content experts have sent me tive questionnaires from reviewers; commissioned queries, corrections, and suggestions. Accuracy is, of detailed reviews from instructors using this book and course, an advantage of a seasoned textbook over a new- those using competing books; held focus groups from comer, and this book has gained a lot of seasoning and a coast to coast in the United States, in which instructors little spice from my extensive correspondence with stu- and students studied the book in advance, then met with dents and colleagues. us to discuss it in depth for several hours, including how This preface describes the book’s intended audience, it compared to other leading A&P textbooks; and created how we determined what students and instructors want in panels of A&P instructors to thoroughly analyze the entire the ideal A&P textbook, what has changed in this edition book and its art program. These efforts have involved to best meet your needs, how this book differs from others, many hundreds of faculty and students and generated and what supplements are available to round out the total thousands of pages of reviews, all of which I have read teaching package. carefully in developing my revision plans. In a less formal viii Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition Preface ix way, the book has improved because of the many e-mails I illustrative concepts not found in other books. Profes- receive from instructors and students worldwide who not sional medical illustrators and graphic artists have ren- only tell me what they like about it, but also raise sugges- dered these, as well as the classic themes of A&P, in a vivid tions for correction or improvement. I’ve responded gen- and captivating style that has contributed a lot to a stu- erously to these e-mails because I learn a great deal look- dent’s desire to learn. ing up answers to readers’ questions, finding sources to As the book has evolved through these three edi- substantiate the book’s content, and sometimes finding tions, I have used larger figures and brighter colors; that I need to update, clarify, or correct a point. adopted simpler, uncluttered labeling; and continued to incorporate innovative illustrative concepts. A good illus- tration conveys much more information than several times How We’ve Met Your Needs as much space filled with verbiage, and I have cut down on the word count of the book to allow space for larger and Our research has consistently revealed that the three qual- more informative graphics. ities instructors value most in a textbook are, in descend- The illustration program is more than line art. I con- ing order of importance, writing style, illustration quality, tinue to incorporate better histological photography and and teaching supplements. I have focused my attention cadaver dissections, including many especially clear and especially on the first two of these and on pedagogic fea- skillful dissections commissioned specifically for this book. tures, while McGraw-Hill Higher Education has continu- Several of my students have modeled for photo- ally engaged other authors and software developers to pro- graphs in this book. As much as possible with the volun- duce a more diverse package of superb supplements for teers who came forth, I have represented an ethnic variety students and instructors. of subjects. Writing Style Supplements Students benefit most from a book they enjoy reading, a book that goes beyond presenting information to also tell The third most highly rated quality is the package of learn- an interesting story and engage the reader with a some- ing supplements for the student and teaching aids for the what conversational tone. That was my guiding principle instructor. Instructors have rated overhead transparencies in finding the right voice for the first edition, and it the most important of all supplements, and we now include remains so in this one. I try to steer a middle course, transparencies of every item of line art in the book, and avoiding rigid formality on one hand or a chatty conde- some of the photographs and tables. Included are unlabeled scending tone on the other. I feel I have succeeded when duplicates of many anatomical figures, useful for testing or students describe the tone as friendly, engaging, collo- labeling to fit one’s individual teaching approach. A full set quial, almost as if the author is talking to them, but not of both labeled and unlabeled illustrations is also available talking down to them. in the Instructor’s Presentation CD-ROM. In devising ways to make the writing more concise Students have expressed growing enthusiasm and without losing the qualities that make it interesting and appreciation for the Online Learning Center and the enjoyable, I have been guided by reviewers who identified Essential Study Partner. We have continued to enrich areas in need of less detail and by students who cited cer- these media with an abundance of learning aids and tain areas as especially engrossing and pleasurable to read. resources. These and other student and instructor supple- In this edition, I somewhat reduced the number of bold- ments are listed and described on page xiii. faced terms and the amount of vocabulary, and fine-tuned such mechanics as sentence length, paragraph breaks, and topic and transitional sentences for improved flow. In What Sets This Book Apart? such difficult topics as action potentials, blood clotting, the countercurrent multiplier, or aerobic respiration, I Those who have not used or reviewed previous editions think this book will compare favorably in a side-by-side will want to know how this book differs from others. reading of competing textbooks. Illustrations Organization When I was a child, it was the art and photography in biol- The sequence of chapters and placement of some topics in ogy books that most strongly inspired me to want to learn this book differ from others. While I felt it was risky to about the subject. So it comes as no surprise that students depart from tradition in my first edition, reviewer com- and instructors rate the visual appeal of this book as sec- ments have overwhelmingly supported my intuition that ond only to writing style in importance. I developed many these represent a more logical way of presenting the Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition x Preface human A&P. Indeed, some have written that they are opening page of each chapter. These fall into three cate- changing their teaching approach because of this book. gories: 101 clinical applications, 13 on medical history, and 9 on evolutionary medicine. For a quick survey of their subject matter, see the lists under these three phrases Heredity in the index. I treat the most basic concepts of heredity in chapter 4 rather than waiting, as most books do, until the last chapter. Stu- Clinical Applications dents would be ill-prepared to understand color blindness, blood types, hemophilia, sex determination, and other topics It is our primary task in A&P to teach the basic biology of if they didn’t already know about such concepts as dominant the human body, not pathology. Yet students want to and recessive alleles, sex chromosomes, and sex linkage. know the relevance of this biology—how it relates to their career aims. Furthermore, disease often gives us our most revealing window on the importance of normal Muscle Anatomy and Physiology structure and function. What could better serve than cys- I treat gross anatomy of the muscular system (chapter 10) tic fibrosis, for example, to drive home the importance of immediately after the skeletal system and joints in order to membrane ion pumps? What better than brittle bone dis- tie it closely to the structures on which the muscles act ease to teach the importance of collagen in the osseous and to relate muscle actions to the terminology of joint tissue? The great majority of Insight sidebars therefore movements. This is followed by muscle physiology and deal with the clinical relevance of the basic biology. Clin- then neurophysiology so that these two topics can be ical content has also been enhanced by the addition of a closely integrated in their discussions of synapses, neuro- table for each organ system that describes common transmitters, and membrane potentials. pathologies and page-references others. Nervous System Chapters Medical History Many instructors cite the nervous system as the most dif- I found long ago that students especially enjoyed lectures in ficult one for students to understand, and in many which I remarked on the personal dramas that enliven the courses, it is presented in a hurry before the clock runs out history of medicine. Thus, I incorporated that approach into on the first semester. Other A&P textbooks devote six my writing as well, emulating something that is standard chapters or more to this system. It is overwhelming to both fare in introductory biology textbooks but has been largely the instructor and student to cover this much material at absent from A&P textbooks. Reviews have shown that stu- the end of the course. I present this system in five chap- dents elsewhere, like my own, especially like these stories. ters, and notwithstanding my assignment of a separate I have composed 13 historical and biographical vignettes to chapter to the autonomic nervous system in this edition, have an especially poignant or inspiring quality, give stu- this is still the most concise treatment of this system dents a more humanistic perspective on the field they’ve among the similar two-semester textbooks. chosen to study, and, I hope, to cultivate an appropriately thoughtful attitude toward the discipline. Historical remarks are also scattered through the general text. Urinary System Profiles of Marie Curie (p. 58), Rosalind Franklin Most textbooks place the urinary system near the end (p.132), and Charles Drew (p.694) tell of the struggles and because of its anatomical association with the reproductive unkind ironies of their scientific careers. Some of my system. I feel that its intimate physiological ties with the favorite historical sidebars are the accounts of William Beau- circulatory and respiratory systems are much more impor- mont’s digestive experiments on “the man with a hole in his tant than this anatomical issue. The respiratory and uri- stomach” (p.977); Crawford Long’s pioneering surgical use nary systems collaborate to regulate the pH of the body flu- of ether, until then known mainly as a party drug (p.628); ids; the kidneys have more impact than any other organ on the radical alteration of Phineas Gage’s personality by his blood volume and pressure; and the principles of capillary brain injury (p.538); and the testy relationship between the fluid exchange should be fresh in the mind of a student men who shared a Nobel Prize for the discovery of insulin, studying glomerular filtration and tubular reabsorption. Frederick Banting and J.J.R. MacLeod (p.671). Except for an unavoidable detour to discuss the lymphatic and immune systems, I treat the respiratory and urinary Evolutionary Medicine systems as soon as possible after the circulatory system. The human body can never be fully appreciated without a “Insight” Sidebars sense of how and why it came to be as it is. Medical liter- ature since the mid-1990s has shown increasing interest in Each chapter has from two to six special topic sidebars “evolutionary medicine,” but most A&P textbooks con- called Insights, listed by title and page number on the tinue to disregard it. Chapter 1 briefly introduces the con- Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition Preface xi cept of natural selection and how certain human adapta- at the end of the chapter, 10 “True/False” questions in the tions relate to our biological past. Later chapters have nine chapter review that require the student to analyze why the Evolutionary Medicine insights and shorter evolutionary false statements are untrue, and usually 5 questions per remarks in the main body of text. Students will find novel chapter in the figure legends, prompting the student to ana- and intriguing ways of looking at such topics as mito- lyze or extrapolate from information in the illustrations. A chondria (p.124), hair (p.204), skeletal anatomy (p.286), great number and variety of additional questions are avail- body odors (p. 595), the taste for sweets (p. 990), the able to students at the Online Learning Center. nephron loop (p. 897), lactose intolerance (p. 970), menopause (p.1060), and senescence (p.1114). System Interrelationships Most instructors would probably agree on the need to emphasize the interrelationships among organ systems Pedagogy and to discourage the idea that a system can be put out of one’s mind after a test is over. This book reinforces the Several features of this book are designed to facilitate the interdependence of the organ systems in three ways. student’s learning. 1.Beginning with chapter 3 (p.93), each chapter has a “Brushing Up” box that lists concepts from Learning Objectives earlier chapters that one should understand before I divide each chapter into typically five or six segments of moving on. This may also be useful to students just a few pages each, with a list of learning objectives at who are returning to college and need to freshen the beginning and a list of “Before You Go On” content up concepts studied years before, and to review questions at the end of each one. This enables stu- instructors who teach the systems in a different dents to set tangible goals for short study periods and to order than the book does. It also reinforces the assess their progress before moving on. continuity between A&P I and II. 2.For each organ system, there is a “Connective Issues” feature (p.212, for example) that Vocabulary Aids summarizes ways in which that system influences all of the others of the body, and how it is A&P students must assimilate a large working vocabulary. influenced by them in turn. This is far easier and more meaningful if they can pro- 3.Chapter 29 includes a section, “Senescence of the nounce words correctly and if they understand the roots Organ Systems,” which can serve as a “capstone that compose them. Chapter 1 now has a section, “The lesson” that compellingly shows how the age- Language of Medicine,” which I hope will help get stu- related degeneration of each system influences, and dents into the habit of breaking new words into familiar is influenced by, the others. Senescence is an roots, and help them appreciate the importance of preci- increasingly important topic for health-care sion in spelling and word use. Pronunciation guides are providers as the population increases in average given parenthetically when new words are introduced, age. This section should sensitize readers not only using a “pro-NUN-see-AY-shun” format that is easy for to the issues of gerontology, but also to measures students to interpret. New terms are accompanied by foot- they can take at a young age to ensure a better notes that identify their roots and origins, and a lexicon of quality of life later on. For instructors who prefer to about 400 most commonly used roots and affixes appears treat senescence of each organ system separately in appendix C (p.A-7). throughout the course, earlier chapters cite the relevant pages of this senescence discussion. Self-Testing Questions Each chapter has about 75 to 90 self-testing questions in various formats and three levels of difficulty: recall, What’s New? description, and analysis or application. The ability to recallterms and facts is tested by 20 multiple choice and I’ve been cautious about reorganizing the book and tam- sentence completion questions in the chapter review. The pering with a structure that has been responsible for its ability to describeconcepts is tested by the “Before You Go success. Nevertheless, the voices of many reviewers have On” questions at the ends of the chapter subdivisions, convinced me that a few changes were in order. totaling about 20 to 30 such questions per chapter. The ability to analyze and applyideas and to relate concepts in different chapters to each other is tested by an average of 5 Changes in Chapter Sequence “Think About It” questions at intervals throughout each chapter, 5 “Testing Your Comprehension” essay questions I made two changes in chapter sequencing and numbering: Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition xii Preface Nervous System Chapters Content Changes The most frequent request has been to give the autonomic I have strengthened the coverage of the following topics nervous system a chapter of its own, with slightly deeper (indicating chapter numbers in parentheses): mitochon- coverage. I have done so at chapter 15. Another common drial diseases (3), autoimmune diseases (5), the stages of request I’ve accommodated has been to discuss the spinal hair growth (6), biomechanics of bone tissue (7), the enteric cord and spinal nerves together in one chapter (now chap- nervous system (15), receptive fields of sensory neurons ter 13) and the brain and cranial nerves together in another (16), hormone-transport proteins (17), the blood-thymus (now chapter 14). barrier (21), clonal deletion and anergy (21), renal autoreg- ulation (23), lipostats and leptin (26), and the trisomies (29). I have updated information on the following, drawing Chemistry on research and review literature as recent as April 2002, Tocompensate for the added nervous system chapter with- even as the book was in production: genetic translation in out making the book longer, and because many reviewers the nucleus (4), signal peptides (4), stem cell research (5), felt that the book could do without two full chapters of hair analysis (6), osteoporosis treatments (7), knee surgery chemistry, I condensed the coverage of chemistry by about (9), muscle–connective tissue relationships (11), mitosis in 25% and combined the two former chemistry chapters into cardiac muscle (11), astrocyte functions (12), surgical treat- one (now chapter 2). This results in a change of chapter ment of parkinsonism (12), amyotrophic lateral sclerosis numbers from 3 through 15, but from chapter 16 to the end, (13), memory consolidation (14), functional MRI (14), the the numbers are the same as in the previous editions. sensory role of filiform papillae (16), a new class of retinal photoreceptors (16), the history of anesthesia (16), the rela- tionship of growth hormone to somatomedins (17), cyto- Changes in Chapter Organization toxic T cell activation (21), asthma (21), neuroimmunology In three cases, I felt that a subject could be presented more (21), atrial natriuretic peptide (23), hunger and body effectively by rearrangements and content substitutions weight homeostasis (26), heritability of alcoholism (26), within a chapter. Other chapters continue to be organized the functions of relaxin (28), contraceptive options (28), as they were in the second edition. the fate of sperm mitochondria (29), Werner syndrome (29), telomeres (29), and theories of aging (29). Chapter 1, Major Themes of Anatomy Issues of Terminology and Physiology In 1999, the Terminologia Anatomica (TA) replaced the Here I replaced the section on human taxonomic classifi- Nomina Anatomica as the international standard for cation with sections on anatomical and physiological anatomical terminology. I have updated the terminology variability. This gives the chapter a less zoological and in this edition accordingly, except in cases where TA ter- more clinical flavor. Also, I feel it is important at the out- minology is, as yet, so unfamiliar that it may be more a set of such a course to instill a sense of the familiar roots hindrance than a help for an introductory anatomy course. of biomedical terms, the importance of precision in For example, I use the unofficial femurrather than the offi- spelling, and other aspects of vocabulary. Thus I moved cialos femorisorfemoral bone. the former appendix B, which introduced students to The TA no longer recognizes eponyms, and I have medical etymology, to chapter 1 (“The Language of Med- avoided using them when possible and practical (using icine,” p.19). tactile discinstead of Merkel disc,for example). I do intro- duce common eponyms parenthetically when a term is Chapter 17, The Endocrine System first used. Some eponyms are, of course, unavoidable (Alzheimer disease, Golgi complex) and in some cases it As many reviewers desired, I have separated endocrine still seems preferable to use the eponyms because of famil- pathology from normal physiology and placed the pathol- iarity and correlation with other sources that students will ogy at the end of the chapter. read (for example, Schwann cellrather than neurilemmo- cyte). Chapter 21, The Lymphatic and I follow the recommendation of the American Med- ical Association Manual of Style (ninth edition, 1998) to Immune Systems delete the possessive forms of nearly all eponyms. There I have found it more effective to present cellular immunity are people who take offense at the possessive form Down’s before humoral immunity, since humoral immunity syndrome and yet may be equally insistent that depends on some concepts such as helper T cells usually Alzheimer’s disease be in the possessive. The AMA has introduced in the context of cellular immunity. grappled with such inconsistencies for years, and I accept Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition Preface xiii its recommendation that the possessives be dropped Suggestions Still Welcome! whenever possible. I make exception for a few cases such as Broca’s area (which would be awkward to pronounce Many features of this book, and many refinements in the without the ’s) and I retain the possessive form for natural writing, illustrations, and factual content, came about laws(Boyle’s law). because of suggestions and questions from instructors and their students. In addition, many things that were tried Pedagogic Changes experimentally in the first edition have been retained in the later editions because of positive feedback from users. I have made the following changes in pedagogy; see the But perfection in textbook writing seems to be an asymp- referenced pages for examples of each: tote, ever approached but never fully reached. I invite my • Added icons to the histological illustrations in chapter colleagues and students everywhere to continue offering 5 to show a place where each tissue can be found such valuable and stimulating feedback as I continue the (pp.162–163). approach. • Added thought questions to some figure legends Ken Saladin (usually five per chapter) and provided answers to Dept. of Biology these at the end of the chapter (p.91). Georgia College & State University Milledgeville, Georgia 31061 (USA) ECF 478-445-0816 Na+ 145 mEq/L K+ 4 mEq/L [email protected] Teaching and Learning Na+ 12 mEq/L K+ 155 mEq/L Supplements Large anions that cannot ICF escape cell McGraw-Hill offers various tools and technology prod- ucts to support the third edition of Anatomy & Physiol- Figure 12.9 Ionic Basis of the Resting Membrane Potential. Note that sodium ions are much more concentrated in the extracellular ogy.Students can order supplemental study materials by fluid (ECF) than in the intracellular fluid (ICF), while potassium ions are contacting their local bookstore. Instructors can obtain more concentrated in the ICF. Large anions unable to penetrate the plasma membrane give the cytoplasm a negative charge relative to the ECF. teaching aids by calling the Customer Service Depart- If we suddenly increased the concentration of Cl(cid:1)ions in the ment, at 800-338-3987, visiting our A&P website at ICF, would the membrane potential become higher or lower than the RMP? www.mhhe.com/ap, or contacting their local McGraw- Hill sales representative. For the Instructor: Instructor’s Presentation CD-ROM This multimedia collection of visual resources allows • For each organ system, added a table of pathologies instructors to utilize artwork from the text in multiple for- which briefly describes several of the most common mats to create customized classroom presentations, visu- dysfunctions and cites pages where other dysfunctions ally based tests and quizzes, dynamic course website con- of that system are mentioned elsewhere in the book tent, or attractive printed support materials. The digital (p.208). assets on this cross-platform CD-ROM are grouped by • Changed the chapter reviews from an outline to a chapter within the following easy-to-use folders. narrative format that briefly restates the key points of Art LibraryFull-color digital files of all the chapter (p.125). illustrations in the book, plus the same art saved in • Shortened the end-of-chapter vocabulary lists, which unlabeled and gray scale versions, can be readily no longer list all boldfaced terms in a chapter, but only incorporated into lecture presentations, exams, or those terms that I deemed most important (p.126). custom-made classroom materials. These images are • Added 10 true/false questions to each chapter review, also pre-inserted into blank PowerPoint slides for with a prompt to explain why the false questions are ease of use. untrue (p.127). The answers to these are in appendix Photo LibraryDigital files of instructionally B (p.A-2). significant photographs from the text—including Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition xiv Preface cadaver, bone, histology, and surface anatomy customized exams. This user-friendly program allows images—can be reproduced for multiple instructors to search for questions by topic, format, or dif- classroom uses. ficulty level; edit existing questions or add new ones; and PowerPoint Lecture OutlinesReady-made scramble questions and answer keys for multiple versions presentations that combine art and lecture notes are of the same test. Although few textbook authors write their provided for each of the 29 chapters of the text. own test banks, this test bank, written by the author him- Written by Sharon Simpson, Broward Community self better reflects the textbook than one contracted out to College, these lectures can be used as they are, or an independent writer. can be tailored to reflect your preferred lecture Other assets on the Instructor’s Testing and Resource topics and sequences. CD-ROM are grouped within easy-to-use folders. The Table LibraryEvery table that appears in the text is Instructor’s Manual and the Instructor’s Manual to accom- provided in electronic form. pany the Laboratory Manual are available in both Word and PDF formats. Word files of the test bank are included In addition to the content found within each chapter, the for those instructors who prefer to work outside of the test- Instructor’s Presentation CD-ROM for Anatomy & Physiology generator software. contains the following multimedia instructional materials: Active Art LibraryActive Art consists of art files Laboratory Manual from key figures from the book that have been converted to a format that allows the artwork to be The Anatomy & Physiology Laboratory Manual by Eric edited inside of Microsoft PowerPoint. Each piece of Wise of Santa Barbara City College is expressly written to art inside an Active Art presentation can be broken coincide with the chapters of Anatomy & Physiology.This down to its core elements, grouped or ungrouped, lab manual has been revised to include clearer explanations and edited to create customized illustrations. of physiology experiments and computer simulations that Animations LibraryNumerous full-color serve as alternatives to frog experimentation. Other animations illustrating physiological processes are improvements include a greatly expanded set of review provided. Harness the visual impact of processes in questions at the end of each lab, plus numerous new pho- motion by importing these files into classroom tographs and artwork. presentations or online course materials. Transparencies This exhaustive set of over 1,000 transparency overheads includes every piece of line art in the textbook, tables, and several key photographs. An additional set of 150 unla- beled line art duplicates is also available for testing pur- poses or custom labeling. Images are printed with better visibility and contrast than ever before, and labels are large and bold for clear projection. English/Spanish Glossary for Anatomy and Physiology This complete glossary includes every key term used in a typical 2-semester anatomy and physiology course. Defin- itions are provided in both English and Spanish. A pho- netic guide to pronunciation follows each word in the glossary. Instructor’s Testing and A Visual Atlas for Anatomy Resource CD-ROM and Physiology This cross-platform CD-ROM provides a wealth of resources for the instructor. Supplements featured on this This visual atlas contains key gross anatomy illustrations CD-ROM include a computerized test bank utilizing that have been blown up in size to make it easier for stu- Brownstone Dipoma@ testing software to quickly create dents to learn anatomy. Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition Preface xv Clinical Applications Manual For more information on the outstanding online tools, refer to the front endsheets of your textbook. Expands on Anatomy and Physiology’s clinical themes, introduces new clinical topics, and provides test ques- GradeSummit tions and case studies to develop the student’s ability to apply his or her knowledge to realistic situations. GradeSummit, found at www.gradesummit.com, is an Internet-based self-assessment service that provides stu- Course Delivery Systems dents and faculty with diagnostic information about sub- ject strengths and weaknesses. This detailed feedback and With help from our partners, WebCT, Blackboard, Top- direction enables learners and teachers to focus study time Class, eCollege, and other course management systems, on areas where it will be most effective. GradeSummit also professors can take complete control over their course enables instructors to measure their students’ progress content. These course cartridges also provide online test- and assess that progress relative to others in their classes ing and powerful student tracking features. The Saladin and worldwide. Online Learning Center is available within all of these platforms! For the Student: MediaPhys CD-ROM This interactive tool offers detailed explanations, high- quality illustrations, and animations to provide students with a thorough introduction to the world of physiology— giving them a virtual tour of physiological processes. MediaPhys is filled with interactive activities and quizzes to help reinforce physiology concepts that are often diffi- cult to understand. Student Study Guide This comprehensive study guide written by Jacque Homan, South Plains College, in collaboration with Ken Saladin, contains vocabulary-building and content-testing exercises, labeling exercises, and practice exams. Acknowledgments A textbook and supplements package on this scale is the product of a well coordinated effort by many dedicated Online Learning Center people. I am deeply indebted to the team at McGraw-Hill Higher Education who have shown continued faith in this TheAnatomy & PhysiologyOnline Learning Center (OLC) book and invested so generously in it. at www.mhhe.com/saladin3offers access to a vast array of For their unfailing encouragement and material sup- premium online content to fortify the learning and teach- port, I thank Vice President and Editor-in-Chief Michael ing experience. Lange and Publisher Marty Lange. My appreciation like- Essential Study PartnerA collection of interactive wise goes out to Michelle Watnick for her years of ener- study modules that contains hundreds of getic promotion of the book and lately her role as Spon- animations, learning activities, and quizzes soring Editor, and to the legion of sales managers and sales designed to help students grasp complex concepts. representatives who work so hard to get the book into the Live News FeedsThe OLC offers course specific hands of my fellow instructors and their students. real-time news articles to help you stay current with Kristine Tibbetts, Director of Development, has been the latest topics in anatomy and physiology. a wonderful editor with whom I’ve been very fortunate to Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition xvi Preface work for the past decade. The appearance of this book For photographs of living subjects, whenever possi- owes a great deal to Kris’s attention to detail and her ble I employed volunteers from among my own students uncompromising commitment to quality, accuracy, and at Georgia College and State University. For kindly lend- esthetics. Were it not for e-mail, our voluminous corre- ing their bodies to the service of science, I thank my stu- spondence would have required the razing of entire forests dents, colleagues, friends, and family members: Laura and probably would have detectably enhanced employ- Ammons, Sharesia Bell, Elizabeth Brown, Amy Burmeis- ment statistics for lumberjacks and postal carriers. Work- ter, Mae Carpenter, Valeria Champion, Kelli Costa, Adam ing closely with Kris and me, Designer K. Wayne Harms Fraley, Yashica Marshall, Diane Saladin, Emory Saladin, also deserves a great deal of credit for the esthetic appeal Nicole Saladin, Dilanka Seimon, Natalie Spires, Xiaodan and readability of these pages. Wang, Nathan Williams, and Danielle Wychoff. The Mary E. Powers, Senior Project Manager, has been improved photographs of joint movements in this edition responsible for monitoring all aspects of the project, keeping (chapter 9), with their multiple-exposure effects, are by me and its many other contributors coordinated and moving Milledgeville photographer Tim Vacula. toward the book’s timely release. She, too, has been a very Thanks once again to my colleagues David Evans and alert reader of the entire manuscript and has spared no effort Eric Wise for their fine work in producing the Instructor’s to incorporate last-minute corrections and to change page Manual and Laboratory Manual, respectively. New thanks to layouts for better figure placement and flow of text. Leslie Miller, M.S.N., for reviewing the manuscript from a A good copyeditor makes one a better writer, and I clinical perspective and offering many helpful suggestions. have learned a great deal from my copyeditors on all edi- The factual content and accuracy of this edition owe tions of this book. On this edition, it was Cathy Conroy’s a great deal to colleagues who are more knowledgeable assiduous attention to detail, ranging from consistency in than I in specific areas of human anatomy and physiology, anatomical synonyms down to the humblest punctuation and to both colleagues and inquisitive students whose mark, that spared me from committing numerous embar- e-mails and other queries sent me to the library to dig still rassing errors and inconsistencies. deeper into the literature. I have gained especially from And always high on my list at McGraw-Hill, I am the lively and fruitful discussions on HAPP-L, the e-mail especially grateful to Colin Wheatley for his conviction, list of the Human Anatomy and Physiology Society over a decade ago, that I had a book in me, and for per- (http://www.hapsweb.org); my heartfelt thanks go to the suading me to give it a go. Few people have changed my many colleagues who have made HAPP-L such a stimulat- life so profoundly. ing and informative site, and to Jim Pendley for maintain- The line art in this edition was beautifully executed ing the list. by the medical illustrators and graphic artists of Imagi- Once again, and first in my appreciation, I thank my neering STA Media Services in Toronto, under the watch- wife Diane, my son Emory, and my daughter Nicole, not only ful and knowledgeable eye of Jack Haley, Content/Art for sharing with me in the rewards of writing, but also for Director. Imagineering illustrator Dustin Holmes pro- bearing up so graciously under the demands of having a full- duced the award-winning cover art for the previous edi- time author cloistered in the inner sanctum of the house. tion and, not surprisingly, I was delighted with his execu- tion of the new cover art for this edition. For the visual Reviewers appeal of this book, credit is also due to McGraw-Hill Photo Coordinator John Leland and Photo Researcher No words could adequately convey my indebtedness and Mary T. Reeg, who worked hard to acquire photographs gratitude to the hundreds of A&P instructors and experts that are clear, informative, and esthetically appealing. I who have reviewed this book in all its editions, and who must also repeat my earlier thanks to anatomists Don Kin- have provided such a wealth of scientific information, cor- caid and Rebecca Gray of the Ohio State University rections, suggestions for effective presentation, and encour- Department of Anatomy and Medical Education Morgue agement. For making the book beautiful, I am indebted to for producing at my behest such clean, instructive dissec- the team described earlier. For making it right,I am thank- tions and clear cadaver photographs. ful to the colleagues listed on the following pages. Saladin: Anatomy & Front Matter Preface © The McGraw−Hill Physiology: The Unity of Companies, 2003 Form and Function, Third Edition Preface xvii Reviewers from the United States Waiston C. Lee Jackie Reynolds Wayne Community College Richland College Adam Leff S. Michele Robichaux Mohammed Abbas Mary E. Dawson Kent State University–Trumbull Nicholls State University Schoolcraft College Kingsborough Community Michael J. Angilletta, Jr. College Campus Angel M. Rodriguez Steven D. Leidich Broward Community College Indiana State University Larry DeLay Barbie W. Baker Waubonsee Community College Cuyahaga Community College Mattie Roig Claire Leonard Broward Community College Florida Community Nicholas G. Despo College–Jacksonville Thiel College William Paterson University Tim V. Roye Alex Lowrey San Jacinto College South Joan I. Barber Danielle Desroches Delaware Technical and William Paterson University of Gainesville College Susan E. Safford Community College New Jersey D.J. Lowrie, Jr. Lincoln University Mary Lou Bareither Waneene C. Dorsey University of Cincinnati Douglas P. Schelhaas University of Illinois at Chicago Grambling State University Jennifer Lundmark University of Mary Clifford L. Barnes E. Christis Farrell California State Waweise Schmidt Regis University Trevecca Nazarene University University–Sacramento Palm Beach Community College Jeanne K. Barnett Dinah T. Farrington Christopher L. McNair William A. Schutt, Jr. University of Southern Indiana Russell Sage College Hardin–Simmons University Southampton College of Long Glenn Merrick Island University Theresa S. Bidle Lorraine Findlay Hagerstown Community College Nassau Community College Lake Superior College Larry J. Scott Lee A. Meserve Central Virginia Community Wendy D. Bircher Pamela B. Fouché Bowling Green State University College San Juan College Walters State Community College Mindy Millard-Stafford Josefina Z. Sevilla-Gardinier Franklyn F. Bolander, Jr. Frederick R. Frank, Jr. Georgia Tech Milwaukee Area Technical University of South Carolina Volunteer State Community Joan M. Bowden College Melissa A. Mills College Anoka–Ramsey Community Kelly Sexton Alfred University Christina A. 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Pilcher South Texas Community College Shelton State Community Southeast Community College University of Southern Indiana Kristin J. Stuempfle College Don V. Plantz, Jr. Gettysburg College Kris A. Kilibarda Redding I. Corbett, III Iowa Western Community College Mohave Community College Mark F. Taylor Midlands Technical College Nikki Privacky Baylor University Shelley A. Kirkpatrick Marya Czech Saint Francis University Palm Beach Community College Diane Teter Lourdes College Gregory K. Reeder South Texas Community College Thomas E. Kober Rosemary Davenport Cincinnati State Technical and Broward Community College Shawn A. Thomas Gulf Coast Community College Community College Tricia A. Reichert Delta State University Patti Davis Marian G. Langer Colby Community College East Central Community College Saint Francis University