Arachnoid
A thin membrane that covers and surrounds the brain and spinal cord. It is the middle layer of the group of three layers that are referred to as the meninges. The other two layers are the pia mater and the dura mater.
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0808 808 1000A thin membrane that covers and surrounds the brain and spinal cord. It is the middle layer of the group of three layers that are referred to as the meninges. The other two layers are the pia mater and the dura mater.