Human anatomy is the study of the structure and organization of the human body. It includes various systems such as the skeletal system, which provides support and protection, and the muscular system, which enables movement. Other important systems include the circulatory system, responsible for transporting blood, and the nervous system, which controls bodily functions and responses. The body is made up of cells, tissues, organs, and systems that work together to maintain life. Key organs include the heart, which pumps blood, the lungs, which facilitate breathing, and the brain, which processes information and coordinates actions. Understanding human anatomy is essential for fields like medicine and biology.