+The **Arachnoid Mater** is the delicate, web-like middle layer of the three [Meninges](/wiki/Meninges) that envelop the [Brain](/wiki/Brain) and spinal cord. It acts as a crucial barrier, suspended between the outer dura mater and inner pia mater, enclosing the vital subarachnoid space.
+## See also
+- [Dura Mater](/wiki/Dura_Mater)
+- [Pia Mater](/wiki/Pia_Mater)
+- [Spinal Fluid](/wiki/Spinal_Fluid)
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