Present the fundamental principles and facts of human physiology in a format that is suitable for undergraduate students regardless of academic backgrounds or fields of study. The most significant feature of this text is its clear and accurate descriptions of mechanisms, rather than mere descriptions of facts and events. As evidence, the book employs numerous flow diagrams that illustrate clearly defined chains of casual links. The text's theme reflects the dominant theme of human physiology; homeostasis. Each body system is approached from the vantage point of homeostasis as achieved through the coordinated functions of homeostatic control systems.