This easy-to-read textbook introduces you to the human body as a living, functioning organism. You'll discover exactly what happens when normal body functions are upset by disease, and see how the body works to restore a state of balance and health. Concrete examples from everyday life help you understand how anatomy and physiology concepts relate to the real world - for example, suntan and sunburn help you understand melanin and pigment cells. Material is presented in 17 self-contained chapters, each exploring a particular aspect of body function. This updated third edition is now easier to use than ever, featuring new, visually-appealing artwork and new Tools for Learning, including easy-to-spot learning objectives and review questions at the end of major sections in each chapter.