半月

The semilunar valves are located at the exit of the heart's ventricles and prevent blood from flowing back into the atria.
半月瓣位于心室出口处，用于防止血液回流至心房。
During systole, the semilunar valves open to allow blood to flow out of the ventricles and into the arteries.
在心脏收缩期，半月瓣打开以允许血液从心室流出并进入动脉。
Diseased semilunar valves can lead to regurgitation or stenosis, both of which can cause serious cardiovascular issues.
病变的半月瓣可能导致反流或狭窄，两者都可能引发严重的心血管问题。
In the human circulatory system, there are two main semilunar valves: the aortic valve and the pulmonary valve.
在人体循环系统中，有两个主要的半月瓣：主动脉瓣和肺动脉瓣。
Semilunar valves are named so because their shape resembles a half-moon when they are closed.
半月瓣之所以得名，是因为它们关闭时的形状像半个月亮。
Surgeons may perform a semilunar valve replacement if one is severely damaged or diseased.
若半月瓣严重受损或病变，外科医生可能会进行半月瓣置换手术。
Unlike the atrioventricular valves, semilunar valves do not have chordae tendineae to support them.
与房室瓣不同的是，半月瓣没有腱索来支撑它们。
Regular physical examination can help detect any abnormalities in the functioning of semilunar valves early on.
定期体检有助于早期发现半月瓣功能异常。
The closing sound of the semilunar valves contributes to the second heart sound heard during auscultation.
半月瓣关闭的声音构成了听诊时听到的第二心音的一部分。
Congenital defects can affect the formation or function of semilunar valves, potentially leading to congenital heart disease.
先天性缺陷可能影响半月瓣的形成或功能，从而可能导致先天性心脏病。