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semilunar valve

semilunar valve Either of two valves in the heart, found in the pulmonary artery (pulmonary valve) and in the aorta (aortic valve), that prevent the backflow of blood into the right and left ventricles from the pulmonary artery and the aorta, respectively, thus maintaining blood flow in a single direction. Each semilunar valve consists of three pockets, which close by filling with blood when the force of contraction that expels the blood from the heart diminishes.

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"semilunar valve." A Dictionary of Biology. . Encyclopedia.com. 17 Oct. 2017 <http://www.encyclopedia.com>.

"semilunar valve." A Dictionary of Biology. . Encyclopedia.com. (October 17, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/semilunar-valve

"semilunar valve." A Dictionary of Biology. . Retrieved October 17, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/semilunar-valve

semilunar valve

semilunar valve n. either of the two valves in the heart, each consisting of three flaps (cusps), that maintain the flow of blood in one direction. See aortic valve, pulmonary (valve).

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"semilunar valve." A Dictionary of Nursing. . Encyclopedia.com. 17 Oct. 2017 <http://www.encyclopedia.com>.

"semilunar valve." A Dictionary of Nursing. . Encyclopedia.com. (October 17, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/semilunar-valve

"semilunar valve." A Dictionary of Nursing. . Retrieved October 17, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/semilunar-valve