valvula semilunaris

例句：

1. 1.The heart valves are responsible for preventing blood from flowing backward through the heart.
   心脏瓣膜负责防止血液逆流通过心脏。
2. 2.The surgeon performed a delicate operation to replace the damaged valve.
   外科医生进行了一次精细的操作来替换受损的瓣膜。
3. 3.The patient was diagnosed with a condition that required the removal of the valvula semilunaris.
   患者被诊断出患有一种需要移除半圆形瓣膜的状况。