Assertion: pia mater | /r/HasProperty | held by fine areolar tissue
Facets:
value: together
type: MANNER
value: extremely
type: DEGREE
Source sentences:
text: The pia mater is a vascular membrane, consisting of a minute plexus of bloodvessels, held together by an extremely fine areolar tissue and covered by a reflexion of the mesothelial cells from the arachnoid trabeculæ.