Assertion: endocardium's layer | /r/HasProperty | outermost fibrous pericardium
Facets:
Source sentences:
text: There are two layers to the pericardial sac: the outermost fibrous pericardium and the inner serous pericardium.
text: There are two layers to the pericardial sac: the outermost fibrous pericardium and the inner serous pericardium.