Assertion: epicardium | /r/HasProperty | inside this sac
Facets:
Source sentences:
text: Inside this sac is the epicardium , a membrane that forms the outermost layer of the wall of the heart.
text: Inside this sac is the epicardium, a membrane that forms the outermost layer of the wall of the heart.
text: Inside this sac is the epicardium, a membrane that forms the outermost layer of the wall of the heart.