Assertion: arachnoid | /r/HasProperty | separated by the subarachnoid cavity
Facets:
value: from the pia mater
type: LOCATION
Source sentences:
text: The arachnoid is a thin, transparent sheath, separated from the pia mater by a comparatively wide interval, the subarachnoid cavity, which is filled with cerebrospinal fluid.
text: The arachnoid is a delicate membrane enveloping the brain and medulla spinalis and lying between the pia mater internally and the dura mater externally; it is separated from the pia mater by the subarachnoid cavity, which is filled with cerebrospinal fluid.