cerebrospinal fluid is contained in the ventricles of the brain that act as a shock absorber to protect the brain. OH YEAH!
it would be 80%
intracellular fluid
It is produced in the brain by modified ependymal cells in the choroid plexus.
It may be cloudy in infections; straw- or yellow-colored if there is excess protein, as may occur with cancer or inflammation; blood-tinged if there was recent bleeding; or yellow to brown...