Your heart has four valves — the pulmonic valve, mitral valve, aortic valve and tricuspid valve. The valves have flaps, called leaflets, inside. The leaflets open and close to control blood flow through your heart and keep it from flowing backward.
Your heart has four valves — the pulmonic valve, mitral valve, aortic valve and tricuspid valve. The valves have flaps, called leaflets, inside. The leaflets open and close to control blood flow through your heart and keep it from flowing backward.