Final answer:
CSF is secreted into each lateral ventricle by a choroid plexus and flows sequentially through the ventricular system, ending in the subarachnoid space for reabsorption.
Step-by-step explanation:
Cerebrospinal fluid (CSF) is secreted into each lateral ventricle by a choroid plexus and flows into the third ventricle. The choroid plexuses are found in all four ventricles and are specialized structures containing ependymal cells that line blood capillaries to filter blood to produce CSF. This fluid then flows into the cerebral aqueduct into the fourth ventricle where even more CSF is produced. Overall, about 500 milliliters of CSF is produced daily. The CSF then leaves the ventricular system and moves into the subarachnoid space through median and lateral apertures, finally being reabsorbed into the blood at the arachnoid granulations.