Either of two heart valves through which blood flows from the atria to the ventricles?

Either of two heart valves through which blood flows from the atria to the ventricles?

• A. Atrioventricular Valve
• B. Semilunar Valve
• C. Pulmonary Valve
• D. Aortic Valve

Answer: (A)

The flow from the atria into the ventricles is controlled by the atrioventricular valves, a pair that includes the mitral valve on the left and the tricuspid valve on the right. These valves open to allow blood to move from the atria into the ventricles during the heart’s filling phase (diastole) and close as the ventricles contract to prevent backflow into the atria. The other valves—the semilunar valves—sit between the ventricles and the large arteries (the pulmonary artery and the aorta). They regulate blood leaving the heart and prevent backflow from the arteries into the ventricles. So, the valves that permit blood to move from the atria to the ventricles are the atrioventricular valves.

The flow from the atria into the ventricles is controlled by the atrioventricular valves, a pair that includes the mitral valve on the left and the tricuspid valve on the right. These valves open to allow blood to move from the atria into the ventricles during the heart’s filling phase (diastole) and close as the ventricles contract to prevent backflow into the atria.

The other valves—the semilunar valves—sit between the ventricles and the large arteries (the pulmonary artery and the aorta). They regulate blood leaving the heart and prevent backflow from the arteries into the ventricles. So, the valves that permit blood to move from the atria to the ventricles are the atrioventricular valves.