]> endocardium EV:0100021 MA:0000076 CALOHA:TS-2075 EMAPA:32686 AAO:0010408 XAO:0000066 MESH:D004699 BTO:0000387 MAT:0000455 Wikipedia:Endocardium EHDAA2:0004153 FMA:7280 EFO:0000821 VHOG:0000084 GAID:550 SCTID:362013006 NCIT:C13004 EMAPA:17868 ZFA:0001320 galen:Endocardium TAO:0001320 UMLS:C0014124 endocardial lining heart endocardium endocardial tissue uberon UBERON:0002165 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]. http://upload.wikimedia.org/wikipedia/commons/6/6c/Gray493.png has part has part has_part tunica intima endocardial endothelium heart layer presumptive endocardium immediate transformation of