Which layer of the meninges is the outermost strong fibrous layer?

The outermost layer of the meninges is the dura mater. It is a thick, durable membrane that serves as a protective covering for the brain and spinal cord. The dura mater provides both structural support and protection against mechanical injuries and is composed of dense, fibrous connective tissue, which gives it strength. This layer is crucial in safeguarding the underlying tissues of the central nervous system.

The arachnoid is the middle layer and has a web-like appearance, but it is not as strong or fibrous as the dura mater, serving different functions, such as providing space for cerebrospinal fluid. The pia mater, on the other hand, is the innermost layer that closely adheres to the surface of the brain and spinal cord, providing a delicate protective barrier. The correct identification of the dura mater as the outermost layer reflects its significant role in the overall protection and functioning of the central nervous system.