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what is the structure of the meninges? explain how the cerebrospinal fluid circulates in the central...

what is the structure of the meninges? explain how the cerebrospinal fluid circulates in the central nervous system.
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The central nervous system is enclosed by a structure known as meninges which contains 3 major layers known as arachanoid matter, dura matter and pia matter.

The dura matter is the outermost layer of meninges which is close to the bone.

The arachnoid matter is middle layer.

The pia matter is the innermost layer of meninges which is close to the central nervous system structure.

The arachnoid matter and pia matter in between have a space known as subarachanoid space. Via this subarachanoid space the cerebrospinal fluid circulates in the central nervous system.

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