Lauralee Sherwood's HUMAN PHYSIOLOGY is the leading physiology text, and in this edition, she has made this text even more up-to-date, accurate and easy to use. The organization has shifted slightly with a new Chapter 4, "Principles of Neural and Hormonal Communication," that now combines the topics of intercellular communication and signal transduction, hormonal communication, and comparison of the nervous and endocrine systems with those of neuronal physiology, synapses, and neuronal integration. The overwhelmingly praised central theme of homeostasis continues to open and close each chapter and helps students better understand how the systems of the body work together. Media tools for learning and teaching continue to be a key strength.