What is the primary function of the meninges and cerebrospinal fluid?

The primary function of the meninges and cerebrospinal fluid is to act as a shock absorber for the brain and spinal cord. The meninges are protective membranes that envelop the central nervous system, consisting of three layers: the dura mater, arachnoid mater, and pia mater. These layers provide physical protection and support.

Cerebrospinal fluid (CSF), which circulates in the subarachnoid space between the arachnoid mater and pia mater, serves as a cushion, absorbing impact and reducing the risk of injury to the brain and spinal cord during sudden movements or trauma. It also helps maintain intracranial pressure and provides a stable chemical environment for the central nervous system.

While regenerating brain cells, delivering oxygen directly, and producing leukocytes are important processes for overall brain health and function, they are not the primary roles of the meninges and cerebrospinal fluid. Therefore, the correct choice focuses specifically on their function in protection and support for the central nervous system.