The membranous encasement surrounding the brain is called the meninges.
The meninges are three layers of protective tissue that cover the brain and spinal cord. These layers are the dura mater, arachnoid mater, and pia mater. Each layer plays a vital role in protecting the brain and maintaining the central nervous system’s overall health.
The dura mater is the outermost layer, known for its toughness and durability. The arachnoid mater sits beneath it, looking somewhat like a web, and serves as a cushion. Finally, the pia mater is the innermost layer that closely envelops the brain, allowing for a rich supply of blood vessels. Together, these layers help safeguard the brain from physical injuries and infections, providing a critical barrier against external threats.