This well-organized, easy-to-read textbook comprehensively covers important concepts in physiology, both at the organ system and cellular levels. It stresses essential and relevant content and includes numerous tables and illustrations. This 2nd edition provides information on the underlying principles of cellular physiology, the autonomic nervous system, neurophysiology, as well as the cardiovascular, respiratory, renal, acid-base, gastrointestinal, endocrine, and reproduction organ systems.