By Susan J. Hall, PhD Deputy Dean of the College of Health Sciences University of Delaware Newark, Delaware Michelle A. Provost-Craig, PhD Associate Professor of Kinesiology and Applied Physiology University of Delaware Newark, Delaware William C. Rose, PhD Associate Professor of Kinesiology and Applied Physiology University of Delaware Newark, Delaware S E C O N D E D I T I O N Anatomy INTRODUCTION TO Physiologyh Publisher The Goodheart-Willcox Company, Inc. Tinley Park, IL www.g-w.com