Written in a clear, straightforward manner, the fourth edition adds two new coauthors, Jim Drummond and Clay Fuqua, each a highly respected scholar in his field. The text is organized by topic rather than by organism; this innovative structure will help you to better understand the general principles of physiology and metabolism. Each chapter ends with a summary, thought-provoking study questions, and an extensive list of references to outside research literature that you can access for more information and detailed explanations of material in the text.