Which layer of the meninges is the outermost layer covering the CNS?

The outermost layer covering the central nervous system (CNS) is the dura mater. This tough and fibrous layer serves several important functions. It provides a durable protective covering that shields the brain and spinal cord from potential damage. Additionally, the dura mater helps to encase the other two layers of the meninges—the arachnoid mater and the pia mater—within its structure.

The dura mater is crucial in maintaining the overall integrity of the central nervous system, as it forms a strong barrier against pathogens and mechanical injury. It also has a role in forming the dural sinuses, which are important for venous blood drainage from the brain. Understanding the function and position of the dura mater helps clarify its importance in the overall protection of the CNS.