Which valves are semilunar valves?

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Multiple Choice

Which valves are semilunar valves?

Semilunar valves are the outflow valves at the bases of the great arteries—the aortic valve and the pulmonary valve. They open when the ventricles contract to push blood into the aorta and pulmonary trunk, and they snap shut when ventricular pressure falls and arterial pressure dominates, preventing backflow into the ventricles. Unlike the atrioventricular valves (mitral and tricuspid), semilunar valves do not have chordae tendineae or papillary muscles anchoring leaflets. So the correct identification is the semilunar valves.

Semilunar valves are the outflow valves at the bases of the great arteries—the aortic valve and the pulmonary valve. They open when the ventricles contract to push blood into the aorta and pulmonary trunk, and they snap shut when ventricular pressure falls and arterial pressure dominates, preventing backflow into the ventricles. Unlike the atrioventricular valves (mitral and tricuspid), semilunar valves do not have chordae tendineae or papillary muscles anchoring leaflets. So the correct identification is the semilunar valves.

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