Assertion: pericardium's layer | /r/CapableOf | form outer layer of the heart
Facets:
Source sentences:
text: Enclosed within the fibrous pericardium, the serous pericardium is itself divided into two layers: the outer parietal layer that lines the internal surface of the fibrous pericardium and the internal visceral layer that forms the outer layer of the heart (also known as the epicardium).