The textbook refl ects modern views on the organization of normal physiological functions.In contrast to traditional textbooks on physiology that describe the physiological properties of particular organs, this textbook provides a systematic basis for the formation of the functions of the entire body, its homeostatic, behavioral, and mental processes.The textbook presents the long-term experience in teaching a course of normal physiology at the Department of Normal Physiology at the I.M. Sechenov First Moscow State Medical University.Recommended by the I.M. Sechenov First Moscow State Medical University as a textbook for students of institutions of higher professional education.