Assertion: pia mater | /r/MadeOf | an invagination of the pia
Facets:
Source sentences:
text: The velum interpositum is a triangular double layer of pia mater formed by an invagination of the pia located between the thalamus and the fornix.
text: The velum interpositum is a triangular double layer of pia mater formed by an invagination of the pia located between the thalamus and the fornix.