Physiology is a course that studies the normal functions and mechanisms of the human body. It explains how organs, tissues, and cells work individually and together to maintain life and health. Key topics include the nervous system, cardiovascular system, respiratory system, endocrine system, digestion, reproduction, and muscle function. Students learn how the body responds to internal and external changes, supporting the understanding of disease and medical treatments. Physiology is essential for careers in medicine, nursing, physiotherapy, biomedical science, and other health and life science fields.