Your heart has four chambers and four valves that regulate blood flow:
Anatomy Function
Left and right atria
Chambers that receive blood returning from your body through your veins
Left and right ventricles
Chambers where blood is pumped to your body through your arteries
Mitral valve
The mitral valve controls the flow of oxygen-rich blood from the left atrium to the left ventricle
Tricuspid valve The tricuspid valve controls the flow of oxygen-poor blood from the right atrium to the right ventricle
Aortic valve
The aortic valve controls flow of oxygen-rich blood from the left ventricle to the body
Pulmonary valve The pulmonary valve controls flow of oxygen-poor blood from the right ventricle to the lungs