Assertion: pia mater | /r/HasProperty | one or two layers of squamous
Facets:
value: to delicate collagenous and elastic fibers
type: TRANSITIVE-OBJECT
value: to cuboidal cells
type: OTHER
Source sentences:
text: The pia mater is a delicate, transparent membrane composed of one or two layers of squamous to cuboidal cells and delicate collagenous and elastic fibers.