Basic Anatomy and Physiology Anatomy and physiology is the study of the body's systems and structures and how they interact. Anatomy focuses on the physical arrangement of parts in the body, while physiology studies the inner functioning of cells, tissues, and organs. There are 12 major anatomy systems: Skeletal, Muscular, Cardiovascular, Digestive, Endocrine, Nervous, Respiratory, Immune/Lymphatic, Urinary, Female Reproductive ... A free online textbook that covers the basic concepts and principles of anatomy and physiology . Learn about the structure and function of the human body, from chemistry and cells to systems and organs, with examples and illustrations.
