The five major organs of the human body are the heart, liver, spleen, lungs and kidneys, which are often referred to as the “five organs” in Chinese medicine. The main function of the heart is to shoot blood out of the heart through diastole and contraction to supply nutrients and oxygen to the organs of the whole body, which can be categorized into body circulation and pulmonary circulation, in addition to the endocrine function of the heart. The main role of the liver is used for detoxification, metabolism, synthesis and secretion of bile, etc.; the main role of the spleen is to filter the blood, immune response and hematopoietic function; the lungs are mainly respiratory, regulating the metabolism of substances, etc.; the main function of the kidneys is to regulate the water-electrolyte and acid-base balance of the organism, eliminating metabolic wastes from the body, regulating arterial blood pressure, etc.. The five major organs also represent several systems, the heart represents the circulatory system, the liver belongs to the digestive system, the spleen belongs to the blood system, the lungs belong to the respiratory system, and the kidneys belong to the urinary system.