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endocardial endothelium development

^ http://purl.obolibrary.org/obo/GO_0061147


The progression of the endocardial endothelium over time, from its initial formation to the mature structure. 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. [ GOC:dph ]