Arachnoid granulations (or arachnoid villi) are small protrusions of the arachnoid (the thin second layer covering the brain) through the dura (the thick outer layer).
arachnoid granulations Normally the pressure of the CSF is higher than that of the venous system, so CSF flows through the arachnoid villi and granulations into the blood
The Cerebrospinal Fluid is absorbed into the venous blood in the dural sinuses through the arachnoid villi. Arachnoid villi connect the subarachnoid space to the superior sagittal sinus.
The middle element of the meninges is the arachnoid membrane
arachnoid granulations
An arachnoid is an alternative term for an arachnid.
arachnoid space
pia and arachnoid
Arachnoid cysts can be classified according to their location and by the type of tissue making up the cyst wall (arachnoid connective tissue or glioependymal tissue).
There are two types of granulation they are Wet Granulation and Dry Granulation.Wet granulation and dry granulation depends on the type of fertilizer granulators and whether adding water during granulation.In general, Roll Extrusion Granulator(Azeus Fertilizer Machinery) is dry granulation machine. It requires moisture of raw materials less than 40% and no water added during granulation. So, it's compound fertilizer granules are also dry, in long-stick shape.But, as for New-type Granulator(organic fertilizer by Azeus Fertilizer Machinery) and Pan Granulator (both organic and compound fertilizer), with required a low moisture of raw materials, water must be add during granulation. Or, the fertilizer granulation will fail.
Arachnoid mater
Infants are most susceptible to developing arachnoid cysts, although cyst formation can occur up through adolescence. Arachnoid cyst development in adults occurs much less frequently. Arachnoid cysts occur predominantly in males.