arachnoid granulations are villi that absorb csf into the venous circulation.
villi that absorb csf into the venous circulation?
arachnoid granulations
the largest granulations lie along the superior sagittal sinus, a large venous space running from front to back along the center of the head (on the inside of the skull). they are, however, present along other dural sinuses as well.





















































section::::function.





















































diffusion across the arachnoid granulations into the superior sagittal sinus returns csf to the venous circulation.
arachnoid granulation
lining the csf-filled ventricles, the ependymal cells play an important role in the production and regulation of csf. their apical surfaces are covered in a layer of cilia, which circulate csf around the cns. their apical surfaces are also covered with microvilli, which absorb csf. within the ventricles of the brain, a population of modified ependymal cells and capillaries together known as the tela choroidea form a structure called the choroid plexus, which produces the csf.
ependyma