<Tr> <Th> FMA </Th> <Td> 20935 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> Cerebrospinal fluid (CSF) is a clear, colorless body fluid found in the brain and spinal cord . It is produced in the choroid plexuses of the ventricles of the brain, and absorbed in the arachnoid granulations . There is about 125mL of CSF at any one time, and about 500mL is generated every day . CSF acts as a cushion or buffer for the brain, providing basic mechanical and immunological protection to the brain inside the skull . CSF also serves a vital function in cerebral autoregulation of cerebral blood flow . </P> <P> CSF occupies the subarachnoid space (between the arachnoid mater and the pia mater) and the ventricular system around and inside the brain and spinal cord . It fills the ventricles of the brain, cisterns, and sulci, as well as the central canal of the spinal cord . There is also a connection from the subarachnoid space to the bony labyrinth of the inner ear via the perilymphatic duct where the perilymph is continuous with the cerebrospinal fluid . </P>

Fluid for the csf is derived from the bloodstream. the sites of csf formation are the