Meninges are in the central nervous system, specifically surrounding the brain and spinal cord. They are protective membranes.
Understanding the Meninges
The meninges are a set of three protective layers that cover and shield the brain and spinal cord, collectively known as the central nervous system (CNS). These layers provide a crucial barrier against physical trauma and infection.
The Three Layers of Meninges
According to the reference material, the meninges consist of three distinct layers:
- Dura mater: The outermost, toughest layer, situated closest to the skull.
- Arachnoid mater: The middle layer.
- Pia mater: The innermost, delicate layer that adheres directly to the brain tissue.
Function of the Meninges
The primary role of the meninges is to protect the central nervous system. They achieve this by:
- Providing a physical barrier to cushion the brain and spinal cord.
- Housing cerebrospinal fluid (CSF), which further cushions and nourishes the CNS.
- Containing blood vessels that supply the brain and spinal cord.
