Question

These structures work to filter our CSF into the dural sinuses such as the superior sagittal sinus

A) spider like projections of the arachnoid mater
B) arachnoid granulations

Answer 1

Answer:

The answer is B) arachnoid granulations

Explanation:

Arachnoid Mater and CSF Circulation:

• The arachnoid is the middle layer of the meninges which are the membranes covering the brain.
• The arachnoid is characterized by the spider web like projections that extend between it and the pia mater (outer membrane of the meninges).
• These projections are located in the subarachnoid space (space below the arachnoid). These projections contain the circulating cerebrospinal fluid or CSF.
• The arachnoid extends into the dural sinuses through the arachnoid granulations in which the CSF is filtered and added to the blood for drainage from the brain.