Author and Executive edite Robert B. Dunn, Ph D Adjunct Associate Profess Loyola University Medical Center 几L Contributors Director of medical Illustration Susan Demesquita, Ph. D Christine shaa Professor, Department of Physiology Marshall School of medicine Director of Publishing and Media Huntington, Stanley S Passo, Ph. D Associate Professor, Department of physiolo Medical Illustrators New York Medical College Rich La Rocco and Christine Schaar valhalla, ny Production editors James Porter, Ph. D University of louisville e rofessor, Department of Kathlyn McGreevy Ruthie Nussbaum Production artist Kenneth H. Ibsen, Ph D Michael Wolff Director of Academic Development professor i University of Californi Joanna mylo Irvine, CA Cover Art Mary Ruebush, Ph. D Rich larocco Adjunct Professor of Microbiolog Montana State University>', "I ~ Authorand ExecutiveEditor Robert B.Dunn, Ph.D. Adjunct Associate Professor Department of Medicine Loyola University Medical Center Chicago, IL Contributors Susan DeMesquita, Ph.D. Professor, Department of Physiology Marshall School of Medicine Huntington, WV Directorof MedicalIllustration ChristineSchaar Directorof PublishingandMedia Michelle Covello Stanley S. Passo, Ph.D. Associate Professor, Department of Physiology New York Medical College Valhalla, NY MedicalIllustrators Rich LaRocco and Christine Schaar James Porter, Ph.D. Professor, Department of Physiology University of Louisville Louisville, KY ProductionEditors Kathlyn McGreevy Ruthie Nussbaum Kenneth H. Ibsen, Ph.D. Director of Academic Development Kaplan Medical Professor Emeritus Biochemistry University of California Irvine, CA ProductionArtist Michael Wolff CoverDesign Joanna Myllo Mary Ruebush, Ph.D. Adjunct Professor of Microbiology Montana State University Bozeman, MT CoverArt Rich LaRocco - - - f