Biology · Coordination and Control

The CNS is covered with three layers of protective coverings called meninges. The outermost layer is the dura mater having its primary function being the protection of the brain and the spinal cord. The dura mater also contains vein-like structures that carry blood from the brain back to the heart. The middle layer is the web-like arachnoid mater. The last layer is the pia mater, which directly contacts and covers the brain and spinal cord like plastic wrap. The space between the arachnoid and pia mater is filled with cerebrospinal fluid

Three layers of membranes known as meninges protect the brain and spinal cord. 

The delicate inner layer is the pia mater. 

The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain.

The tough outer layer is called the dura mater.

This option is incorrect.

Three layers of membranes known as meninges protect the brain and spinal cord. 

The delicate inner layer is the pia mater. 

The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain.

The tough outer layer is called the dura mater.

This option is incorrect.

Three layers of membranes known as meninges protect the brain and spinal cord. 

The delicate inner layer is the pia mater. 

The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain.

The tough outer layer is called the dura mater.

This option is incorrect.

Three layers of membranes known as meninges protect the brain and spinal cord. 

The delicate inner layer is the pia mater. 

The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain.

The tough outer layer is called the dura mater.