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The meninges are a trio of protective membranes that encase the brain and spinal cord. They consist of three layers: dura mater, arachnoid mater, and pia mater.
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Dura Mater: The tough, outermost membrane surrounding and protecting the brain and spinal cord.
Arachnoid Mater: The web-like middle layer of meninges that cushions the central nervous system.
Pia Mater: The delicate innermost membrane that clings tightly to the brain and spinal cord.