part of part of artery endothelium of artery AAO:0011013 An endothelium that is part of an artery [Automatically generated definition]. BTO:0004757 EMAPA:35148 FMA:62116 MA:0000707 The endothelium is the thin layer of cells that lines the interior surface of blood vessels, forming an interface between circulating blood in the lumen and the rest of the vessel wall.[AAO] UBERON:0001917 UMLS:C1179025 VHOG:0001215 Vertebrates and a very few invertebrates such as squids have evolved a secondary epithelium, the endothelium, that lines their blood vessels.[well established][VHOG] XAO:0000357 arterial endothelium artery endothelium uberon endothelium endothelial tube blood vessel endothelium arterial system endothelium