What is a semilunar valve and where is it present?

1 Answer
Jul 19, 2017

A semilunar valve has three crescentic cusps which allow unidirectional blood flow. The semilunar valves guard opening of large blood vessels arising from heart.

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There is right pulmonary valve and left aortic valve-- both semilunar type.

  • Right one allows deoxygenated blood to flow out of right ventricle into pulmonary artery.
  • Left one allows oxygenated blood to flow out of left ventricle into aorta.

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