Cerebrospinal fluid

Cerebrospinal fluid (CSF) is a clear fluid that surrounds the brain and spinal cord. It is produced in the choroid plexus of the brain and circulates through the brain's ventricular system and around the spinal cord. The cerebrospinal fluid serves as a cushion for the brain and spinal cord, helps to circulate nutrients and oxygen to these organs, removes waste products from them, and helps to protect them from injury.