Which layer of the meninges is described as thin and net-like?

Which layer of the meninges is described as thin and net-like?

• A. Arachnoid
• B. Pia mater
• C. Dura mater
• D. Ventricles

Answer: (A)

The arachnoid layer of the meninges is characterized as thin and net-like in appearance. This membrane is situated between the dura mater, which is the tough outer layer, and the pia mater, the innermost layer closely adhering to the surface of the brain and spinal cord. The net-like structure of the arachnoid allows for the presence of the subarachnoid space, which contains cerebrospinal fluid. This space serves several critical functions, including cushioning the brain and spinal cord, preventing mechanical injury, and allowing for the exchange of nutrients and waste products. The description of the arachnoid as thin and net-like accurately reflects its structure and role in protecting and supporting the central nervous system.