subarachnoid space

Actual space separating 2 of the layers of the meninges, the pia and arachnoid, that surround the brain and spinal cord; contains cerebrospinal fluid, arteries and veins, and filaments of arachnoid matter, giving it the appearance of a spider web.

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Related Words

arachnoid ; brain ; cerebrospinal fluid (CSF) ; meninges ; pia ; spinal cord