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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

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Iqta

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.

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