Assertion: brain's cortex | /r/HasProperty | gray
Facets:
Source sentences:
text: The cortex is gray because nerves in this area lack the insulation that makes most other parts of the brain appear to be white.
text: The cerebral cortex (gray matter) is the outside portion of the cerebrum and provides us with functions associated with conscious thought.
text: The outer layer of the cerebrum is called the cortex (also known as "gray matter").