Cerebrospinal Fluid Enters the Blood Circulation at The

Question

Cerebrospinal fluid enters the blood circulation at the
A) jugular veins.
B) central canal.
C) arachnoid granulations.
D) tentorium cerebelli.
E) frontal sinus.

Accepted Answer

Cerebrospinal fluid (CSF) enters the blood circulation at the arachnoid granulations, which are small, finger-like projections of the arachnoid mater that protrude into the venous sinuses of the brain. CSF flows through these granulations and into the bloodstream, where it is reabsorbed and then undergoes metabolic breakdown. This process helps regulate the volume and pressure of CSF within the brain and spinal cord, and also plays a key role in removing waste products and other toxins from the central nervous system.