The biological clock, also known as the physiological clock, is an invisible clock in the living body. It is actually the internal rhythm of life activities of organisms, which is determined by the order of time structure in organisms. Through the study of biological clock, new disciplines such as chronobiology, chronopharmacology and chronotherapeutics have emerged.

Introduction of biological clock

The quality and quantity that can control the development of time and space in life is called biological clock. All animals on the earth have a physiological mechanism called biological clock, which is a 24-hour cycle rhythm from day to night. For example, a period of light and dark coincides with the earth's rotation once. The study of biological clock is of great significance in medicine and promotes the basic theoretical research of biology. In 20 17, three American scientists won the Nobel Prize in Physiology or Medicine for their research achievements in the molecular mechanism of biological clock operation.