What functions do the four heart valves include?

The four heart valves—tricuspid, pulmonary, mitral, and aortic—regulate blood flow through the heart and ensure it moves in the correct direction. The tricuspid valve controls blood flow from the right atrium to the right ventricle, while the pulmonary valve directs blood from the right ventricle to the lungs. The mitral valve allows blood to flow from the left atrium to the left ventricle, and the aortic valve regulates blood flow from the left ventricle into the aorta, supplying oxygenated blood to the body. Together, these valves maintain efficient circulation and prevent backflow.