This document provides an introduction to human anatomy and physiology. It discusses that anatomy is the study of body structure, including size, shape and composition, while physiology is the study of how the body functions. It notes that anatomy provides knowledge of organ structure, physiology provides knowledge of organ functions, and pathophysiology is the study of dysfunctional processes. The document outlines that anatomy can be studied at different organizational levels, from cells to whole body systems. It emphasizes the importance of understanding anatomy and physiology for purposes like sports performance and injury prevention and rehabilitation.