Assertion: endocardium | /r/CapableOf | line the cavity of the heart
Facets:
Source sentences:
text: Endocardium lines the cavity of the heart and made of flat squamous cells derived from endoderm of the embryo.
text: The endocardium is the epithelial layer lining all the cavities of the heart, the myocardium is the thick muscular layer formed by cardiac muscles, and the epicardium is a serous membrane of the heart.