Human Excretory System

The meninges are the protective layers that surround the brain and spinal cord. They are arranged in the following order from outermost to innermost: Dura mater: The thick, tough outermost layer that provides strong protection. Arachnoid mater: The middle layer with a web-like structure. Pia mater: The thin, delicate innermost layer that closely adheres to the surface of the brain and spinal cord. This arrangement ensures proper protection and cushioning for the central nervous system.