Which valves are the semilunar valves?

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Multiple Choice

Which valves are the semilunar valves?

Semilunar valves sit at the exit points of the ventricles, guarding the bases of the aorta and the pulmonary trunk. They have three pocket-like cusps that open to allow blood to be ejected from the ventricles and then close to prevent backflow during relaxation. The two valves that fit this description are the aortic valve and the pulmonary valve. In contrast, the valves between the atria and ventricles—the tricuspid and mitral valves—are on the heart’s atrioventricular junctions and rely on chordae tendineae and papillary muscles to prevent leaflet prolapse when the ventricles contract.

Semilunar valves sit at the exit points of the ventricles, guarding the bases of the aorta and the pulmonary trunk. They have three pocket-like cusps that open to allow blood to be ejected from the ventricles and then close to prevent backflow during relaxation. The two valves that fit this description are the aortic valve and the pulmonary valve.

In contrast, the valves between the atria and ventricles—the tricuspid and mitral valves—are on the heart’s atrioventricular junctions and rely on chordae tendineae and papillary muscles to prevent leaflet prolapse when the ventricles contract.

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