这个词是什么意思？
A layer of epithelium that lines the heart, blood vessels (ENDOTHELIUM, VASCULAR), lymph vessels (ENDOTHELIUM, LYMPHATIC), and the serous cavities of the body.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D004727 · MeSH 2026。
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