part of part of has part has part immediate transformation of heart endothelium endocardium AAO:0010408 BTO:0000387 CALOHA:TS-2075 EFO:0000821 EHDAA2:0004153 EMAPA:17868 EMAPA:32686 EV:0100021 FMA:7280 GAID:550 Layer that lines the lumen of the heart.[TAO] MA:0000076 MAT:0000455 MESH:D004699 OpenCyc:Mx4rsWA75K1cEduAAADggVaqvw Part of the heart comprised of thin serous membrane, composed of endothelial tissue, that lines the interior of the heart.[AAO] TAO:0001320 The endocardium is an anatomical structure comprised of an endothelium and an extracellular matrix that forms the innermost layer of tissue of the heart, and lines the heart chambers[GO]. Tunica intima which has as its parts the endothelium of endocardium and the fibroelastic connective tissue that surrounds the cavity of a cardiac chamber. UBERON:0002165 UBERON:0006225 UMLS:C0014124 VHOG:0000084 XAO:0000066 ZFA:0001320 endocardial lining endocardial tissue fixed in GO to reflect FMA. See email to David/Varsha June 18 2010 galen:Endocardium heart endocardial tissue heart endocardium uberon tunica intima heart layer presumptive endocardium heart endothelium