Meninges of the Brain and Spinal Cord

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The meninges is a series of membranes that cover the central nervous system. The meninges consist of three layers: the dura mater, the arachnoid mater, and the pia mater. These layers cover the brain and spinal cord with the primary function of protecting and nourishing the central nervous system. Read on to learn more about the meninges, and the role it plays in your body.

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Meninges
Meninges of the Brain

The meninges covers and protects the central nervous system including the brain and spinal cord. The meninges consist of three layers: the dura mater, the arachnoid mater, and the pia mater.

The dura mater is the outermost of the three layers making up the meninges. It is a thick, durable membrane, and is closest to the skull. It is responsible for keeping in the cerebrospinal fluid, and for surrounding and supporting the dural venous sinuses that carry blood from the brain to the heart.

The arachnoid mater is the middle layer of the meninges, and is named from its spider web-like appearance. It provides a cushioning for the central nervous system.

The pia mater is the innermost layer of the meninges. It envelopes and firmly attaches to the surface of the brain and spinal cord. The pia mater contains blood vessels and capillaries that are responsible for nourishing the brain.

 

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