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(spinal cord) ©Ron Boardman/Stone/Getty Images, Inc Back cover photo credits: (top left) ©Dr Don Fawcett/Visuals Unlimited/Getty Images, Inc. (red blood cells) ©Dr Don Fawcett/Visuals Unlimited/Getty Images, Inc. JWC元16_fm_i-xxxiv.qxd 21:22 Page i Principles of ANATOMY & PHYSIOLOGY 13th Edition Gerard J Tortora Bergen Community College Bryan Derrickson Valencia Community College John Wiley & Sons, Inc JWC元16_fm_i-xxxiv.qxd 11/22/10 7:01 PM Page ii Vice President & Publisher Executive Editor Executive Marketing Manager Developmental Editor Senior Media Editor Project Editor Program Assistant Production Manager Production Editor Senior Illustration Editor Illustration Coordinator Senior Designer Text Designer Photo Department Manager Production Management Services Kaye Pace Bonnie Roesch Clay Stone Mary Berry Linda Muriello Lorraina Raccuia Lauren Morris Dorothy Sinclair Sandra Dumas Anna Melhorn Claudia Volano Madelyn Lesure Brian Salisbury Hilary Newman Ingrao Associates Page layout was completed by Laura Ierardi, LCI Design Photo Credits Front cover photo credits (bottom left to right): (muscle) ©Mark Nielsen (neuron cell body) ©Dr Don Fawcett/Visuals Unlimited/Getty Images, Inc.