Assertion: epithelium's cell | /r/CapableOf | act as insulator
Facets:
value: between the circulating blood
type: LOCATION
value: between the vessel wall
type: LOCATION
value: sometimes
type: TEMPORAL
Source sentences:
text: Glial cells support the neurons and facilitate this process (sometimes acting as insulators).
text: These cells act as an interface between the circulating blood and the vessel wall.