Human body to comparative physiology and ecophysiology. Most recently, evolutionary physiology has become a distinct subdiscipline. Human body The human body is the structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organ systems. They ensure homeostasis and the viability of the human body. It comprises a head, neck, trunk (which includes the thorax and abdomen), arms and hands, legs and feet. The study of the human body involves anatomy, physiology, histology and embryology. The body varies anatomically in known ways. Physiology focuses on the systems and organs of the human
Traditional Chinese medicines derived from the human body "cruel or foul". Li Shizhen sharply criticized medicinal usage of bone and flesh. In ancient times, people thought it a benevolent deed to bury discarded human bones. Such people thought that they would be rewarded with good. But some alchemists [方伎] collect human bones and use them as a drug with the hope of making a profit from them. Should this be done to those who save people from diseases? Even dogs do not eat the bones of dogs. Why should a human eat the bones of other humans? (52.27, tr. Luo 2003: 4178-9) Under the 52.34 human flesh entry,