What are the three layers that cover both the brain and spinal cord?

The three layers that cover both the brain and spinal cord are known as the meninges, which consist of the dura mater, pia mater, and arachnoid mater.

The dura mater is the tough outer layer that provides a protective barrier, while the arachnoid mater lies just beneath it and is web-like in structure, allowing for the flow of cerebrospinal fluid. The pia mater is the delicate innermost layer that closely adheres to the surfaces of the brain and spinal cord, providing additional protection and support.

Understanding these layers is crucial for grasping how the central nervous system is protected from injury and infection, as well as the role they play in the circulation of cerebrospinal fluid and overall neural function.