Located between the ventricle and the corresponding artery, arterial valves exist only in the aorta and pulmonary artery, mainly: 1. The aortic valve, located between the left ventricle and the aorta, three semilunar valves make up the aortic valve, which is to prevent the backflow of arterial blood, when the ventricle contracts, the arterial valve opens, arterial blood passes through the aortic valve into the aorta, and then supplies blood and oxygen to various organs of the body, when the ventricle diastolic, the aortic valve closes and The pulmonary valve, located between the right ventricle and the pulmonary artery, allows venous blood from the body to flow into the right atrium, through the tricuspid valve to the right ventricle, and then when the right ventricle contracts, the pulmonary valve opens and venous blood flows into the pulmonary artery for pulmonary circulation, and through pulmonary ventilation venous blood becomes arterial blood and flows into the left atrium through the pulmonary vein, and when the right ventricle is diastolic, the pulmonary valve closes to prevent regurgitation. . These two valves are very important for the body’s pulmonary and body circulation, and abnormalities in the valves can lead to insufficient blood supply, ischemia, and hypoxia in various organs.