…Each valve consists of three semicircular cusps. The cusps of the aortic valve are attached to a fibrous aortic annulus, whereas the pulmonary valve does not have an annulus like the other valves. Its cusps are supported by the muscular infundibulum, which is the outflow part of the right ventricle, and are separated from the aortic annulus by the posterior wall of the infundibulum. The left and right aortic valves open during the ejection phase when the ventricle contracts, and send blood into the arteries. … *Some of the terminology that refers to "aortic valve" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…いずれもそれぞれ3個の半月状の弁尖からなる。大動脈弁aortic valveの弁尖は繊維性の大動脈弁輪に付着するが,肺動脈弁pulmonary valveは他の弁に相当するような弁輪はもたず,その弁尖は右心室の流出部である筋性漏斗部により支持され,大動脈輪とは漏斗部後壁により分けられる。左右の動脈弁は心室が収縮する場合の駆出期に開き,血液を動脈内へ送り出す。… ※「aortic valve」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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