Examlex
The __________ acts as a countercurrent exchanger.
Arachnoid mater
A delicate membrane that is one of the three layers (meninges) surrounding the brain and spinal cord, providing protection.
Meninges
Membranes that protect the brain and spinal cord.
Subarachnoid space
The area between the arachnoid membrane and pia mater around the brain and spinal cord, filled with cerebrospinal fluid.
Meninges
Protective membranes that cover the brain and spinal cord, providing defense against injury and infection.
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