Assertion: pia mater | /r/HasProperty | formed in bird
Facets:
Source sentences:
text: The meninx primitiva refers to the mesenchymal covering of the brain from which the arachnoid mater, pia mater and dura mater are formed in mammals and birds.
text: The meninx primitiva refers to the mesenchymal covering of the brain from which the arachnoid mater, pia mater and dura mater are formed in mammals and birds.