Three layers that protect and cover the brain?

The three layers that protect and cover the brain are:

1. Dura Mater: The dura mater is the outermost and toughest layer of the meninges, the protective covering of the brain and spinal cord. It is a dense, fibrous membrane that lines the inner surface of the skull and extends down the spinal canal.

2. Arachnoid Mater: The arachnoid mater is a delicate, web-like membrane that lies deep to the dura mater. It is separated from the dura mater by the subdural space, which contains a small amount of fluid. The arachnoid mater is covered in tiny, finger-like projections called arachnoid villi, which help to drain cerebrospinal fluid (CSF) from the brain.

3. Pia Mater: The pia mater is the innermost and most delicate layer of the meninges. It is a thin, highly vascularized membrane that closely follows the contours of the brain and spinal cord. The pia mater contains numerous blood vessels that supply oxygen and nutrients to the brain and spinal cord.