Assertion: endocardium's layer | /r/CapableOf | line inner surface of the heart
Facets:
Source sentences:
text: And the inmost layer is the endocardium, a very thin smooth layer of cells that lines the inner surface of the heart.
text: And the inmost layer is the endocardium, a very thin smooth layer of cells that lines the inner surface of the heart.
text: And the inmost layer is the endocardium , a very thin smooth layer of cells that lines the inner surface of the heart.