这个词是什么意思？
Highly specialized EPITHELIAL CELLS that line the HEART; BLOOD VESSELS; and lymph vessels, forming the ENDOTHELIUM. They are polygonal in shape and joined together by TIGHT JUNCTIONS. The tight junctions allow for variable permeability to specific macromolecules that are transported across the endothelial layer.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D042783 · MeSH 2026。
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