Assertion: pia mater | /r/CapableOf | form tight membrane
Facets:
value: around the brain and spinal cord
type: LOCATION
value: of a cobweb
type: OTHER
Source sentences:
text: It forms a tight membrane around the brain and spinal cord, acting as an an additional barrier and aiding in the secretion and containment of cerebrospinal fluid.
text: Thus, instead of a cobweb, it forms a tight membrane around the brain and spinal cord.