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.