Final answer:
Cerebrospinal fluid (CSF) provides protection and cushioning for the brain and spinal cord, and it also helps in the clearance of metabolic wastes from the central nervous system.
Step-by-step explanation:
Cerebrospinal fluid (CSF) serves several critical functions in protecting and maintaining the homeostasis of the central nervous system. The first key function of CSF is as a mechanical buffer, providing protection and cushioning for the brain and spinal cord. This is crucial because the buoyant nature of CSF allows the brain to maintain its position within the skull, mitigating the potential damage from mechanical shocks or impacts. Secondly, CSF performs a vital role in the clearance of metabolic wastes from the central nervous system. As it circulates, it picks up waste products from the brain tissue and transports them to areas where they can be reabsorbed into the bloodstream and eventually filtered out of the body. These two functions are among the primary ways in which CSF contributes to the overall health and function of the CNS.