Cerebrospinal Fluid (CSF)
Cerebrospinal fluid (CSF) is clear fluid found in the brain and spinal cord. It is contained in cavities called ventricles. This colorless fluid is crucial in protecting the brain as it acts like a cushion. Its one-way flow to the blood is beneficial in removing harmful substances from the brain. Also, CSF transports hormones to other brain parts. A CSF sample can be taken through lumbar puncture .