What is the final structure that CSF is resorbed into?

The final structure into which cerebrospinal fluid (CSF) is resorbed is the superior sagittal sinus. CSF is produced mainly in the ventricles of the brain, and once it circulates through the ventricular system and the subarachnoid space, it needs to be resorbed to maintain proper fluid balance, avoid excessive pressure, and facilitate the removal of metabolic waste.

Arachnoid granulations are small protrusions of the arachnoid mater into the dura mater. These granulations are the actual structures through which CSF passes to enter the bloodstream, but they do not serve as the ultimate site of absorption. Instead, they act as the gateway for CSF to move into the superior sagittal sinus, which is a large venous sinus located along the top of the skull. Once CSF has traversed the arachnoid granulations, it enters the superior sagittal sinus where it mixes with venous blood and is eventually drained from the cranial cavity.

The other options, like the cerebral aqueduct and the lateral ventricles, are part of the ventricular system or pathways that carry or produce CSF, but they do not play a direct role in the resorption process. Therefore, the superior