Cerebrospinal fluid (CSF) is secreted within the central nervous system (CNS) and fills in the ventricles, the subarachnoid space of the brain, and the spinal column. CSF's role is to protect the brain from physical impacts. Furthermore, CSF plays a crucial role in the circulation of nutrients and chemicals in the blood and in waste management by actively transporting or facilitating bulk flow (from the extracellular fluid of the brain to the subarachnoid space