The meninges are a part of the central nervous system. Meninges are very fine membranes that provide a covering to the brain and the spinal cord.
Meninges consist of three layers. The outermost layer is the ‘dura mater’. It is a tough and durable membrane that lines the skull and bones of vertebral canal that holds the spinal cord within. The dura mater surrounds and supports the dural sinuses carrying blood from the brain toward the heart. The ‘arachnoid mater’, the second layer is a thin transparent membrane that appears like a loosely fitting sac attached to the dura mater. It provides a cushioning effect for the brain and the spinal cord.
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