Four valves regulate blood flow through your heart:

•    The tricuspid valve regulates blood flow between the right atrium and right ventricle.

•    The pulmonary valve controls blood flow from the right ventricle into the pulmonary arteries, which carry blood to your lungs to pick up oxygen.

•    The mitral valve lets oxygen-rich blood from your lungs pass from the left atrium into the left ventricle.

•    The aortic valve opens the way for oxygen-rich blood to pass from the left ventricle into the aorta, your body’s largest artery.