这个词是什么意思？
Flaps of tissue that prevent regurgitation of BLOOD from the HEART VENTRICLES to the HEART ATRIA or from the PULMONARY ARTERIES or AORTA to the ventricles.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D006351 · MeSH 2026。
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