The study of the human body involves anatomy, physiology, histology and embryology.
It comprises a head, neck, trunk (which includes the thorax and abdomen), arms and hands, legs and feet. They ensure homeostasis and the viability of the human body. It is composed of many different types of cells that together create tissues and subsequently organ systems. The human body is the structure of a human being. Naturally-occurring pubic, body, and facial hair has been deliberately removed to show anatomy Female (left) and male (right) adult human bodies photographed in ventral (above) and dorsal (below) perspectives.