Assertion: endocardium's layer | /r/CapableOf | turn at the base of the heart
Facets:
value: inward
type: MANNER
Source sentences:
text: The serous layer of the Pericardial Sac turns inward at the base of the heart and forms the ____
text: The serous layer turns inward at the base of the heart and forms the visceral pericardium.