Physiology is an integrative science which considers the function of each organ and organ system and their interaction in the maintenance of life. This book is designed to provide the foundation for understanding the normal function of the human body. Each chapter emphasizes the basic concepts that apply to each organ and organ system as well as their integration to maintain homeostasis and proper responses to perturbations such as exercise, illness, and trauma. The organ systems covered include: nervous, muscle, cardiovascular, respiratory, endocrine, reproductive, gastrointestinal, and urinary. Examples from daily life activities and clinical scenarios as well as review questions are presented to illustrate basic science principles, to facilitate integration of the course content and to foster problem solving skills.