The liver is the largest substantial organ in the body and is known as the “integrated chemical plant of the human body”. The liver plays a very important role in the human body. I. Participate in human metabolism All the sugars, proteins, fats, vitamins and hormones needed in the human body are metabolized through or with the participation of the liver. The liver is involved in bile production and excretion: bile is manufactured and secreted by liver cells and then transported via the bile duct to the gallbladder for concentration and discharge. Bile can help the digestion and absorption of fat in the small intestine. Second, participate in detoxification The wastes and foreign toxins, toxins and products of metabolic decomposition produced in the process of human metabolism are detoxified in the liver. Third, participate in blood coagulation function Most of the coagulation factors in the body, are manufactured by the liver, the liver plays an important role in the dynamic balance of coagulation system function. The severity of liver impairment parallels the degree of coagulation disorder, and patients with liver failure often die from bleeding. IV. Involvement in immune function The liver is the largest reticuloendothelial cell phagocytic system. Therefore there is a close relationship with immune capacity. V. Other functions of the liver The liver is involved in the body’s blood volume, heat production and regulation of water and electrolytes. In liver damage, it is common for water and sodium to be retained in the body, forming edema.