What is the space between the Arachnoid mater and Pia meter?

The space between the arachnoid mater and pia mater is called the subarachnoid space. This area is filled with cerebrospinal fluid (CSF), which cushions the brain and spinal cord, providing protection and maintaining a stable environment. The subarachnoid space also contains blood vessels that supply the brain. It plays a crucial role in the overall function and health of the central nervous system.