Final answer:
The meninges are arranged from superficial to deep as dura mater, arachnoid mater, and pia mater. The space between the arachnoid and pia maters is filled with cerebrospinal fluid (CSF).
Step-by-step explanation:
The layers of the meninges, which are the protective coverings of the brain and spinal cord, are arranged from superficial to deep as follows:
- Dura mater: The outermost layer, it is a thick membrane that protects the brain and spinal cord.
- Arachnoid mater: The middle layer, it is a web-like membrane that defines a sac-like enclosure around the central nervous system.
- Pia mater: The innermost layer, it directly contacts and covers the brain and spinal cord.
The space between the arachnoid and pia maters is filled with cerebrospinal fluid (CSF), which provides cushioning and circulation of chemical substances in the central nervous system.