Answer:
Mitral Valve
Explanation:
The valves are made of strong, thin flaps of tissue called leaflets or cusps.
The leaflets open to let blood move forward through the heart during half of the heartbeat. They close to keep blood from flowing backward during the other half of the heartbeat.The Chordae tendineae and papillary muscles keep the leaflets stable to prevent blood from flowing backward. The mitral valve has only two leaflets. The leaflets are attached to and supported by a ring of tough, fibrous tissue called the annulus. The annulus helps to maintain the proper shape of the valve, and of course hold the leaflets in place.
