This accurate and up-to-date introductory text on human form and function presents a large, complex body of scientific knowledge in an easily understood, conversational writing style. Focusing on concepts rather than just descriptions to help students unify information, the text uses a big picture theme of body function and explains the body's homeostatic regulation. Many practical features and hundreds of full-color illustrations enhance text content, and critical thinking learning opportunities are integrated throughout. New illustrations, revised Career Choices boxes in each unit, and current topics - including anthrax and the human genome project - have been added to this edition.