Assertion: arachnoid | /r/HasProperty | five or six layers of squamous
Facets:
Source sentences:
text: The arachnoid mater consists of the arachnoid membrane—five or six layers of squamous to cuboidal cells adhering to the inside of the dura—and a looser array of cells and collagenous and elastic fibers spanning the gap between the arachnoid membrane and the pia mater.