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it reabsorbs cerebrospinal fluid and returns it to the venous circulation
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∙ 11y ago
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What drains cerebrospinal fluid in to venous blood in the dural sinus?
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.
What function reabsorbs cerebral spinal fluid back into the blood?
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
Where does Cerebrospinal fluid enter the bloodstream?
arachnoid granulations
What are the three types of villi?
The three types of villi are: Intestinal villi-microscopic finger like projections on the inner surface of the ileum. Chorionic villi-villi on the outermost membrane of the foetus. Arachnoid villi-villi on the arachnoid membrane of the brain.
What causes arachnoid granulation?
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).
What are the arachnoid villi?
They are small protrusions into the venous sinus
How is most of the CSF absorbed?
Most of the fluid is absorbed back into the bloodstream through vessels lining branched projections from the arachnoid membrane called arachnoid villi, or granulations. These arachnoid granulations extend into the dura
What are the consequences of blocked arachnoid villi?
Arachnoid villi can be compared to the drain in your shower or sink. Think about a wad of hair covering the drain. The water cannot drain out and if more water is added without removing the blockage, there will be a build-up of water. It is the same with your arachnoid villi. If blockage occurs, the cerebrospinal fluid won't be able to flow freely, thus building up pressure. This is called hydrocephalus or "water on the brain".
What are finger like structures that project into the dural sinuses to allow drainage of the csf?
arachnoid villi
What is the function of the arachnoid vill?
Its a protective layer around the brain and spinal cord bettween the Dura mater and Pia mater
Where does the csf drain from subarachnoid space?
In the brain we have small protrusions of the arachnoid and subarachnoid space into the venous system. These protrusions are called arachnoid villi or arachnoid granulations and they allow for drainage of CSF into the venous system. Another source of CSF drainage is the lymphatic system.
What is the inner wall of the villi line?
The small intestine is lined with microscopic fingerlike strutcures called villi which increase the surface area of the small intestine fo absorption. The spaces between villi are like a sieve that absorb the food particles into the bloodstream. There are three types of villi. Intestinal Villi which lines the intestines, Chorionic Villi which is on the outer most membrane of a fetus and Arachnoid Villi which is on the arachnoid membrane of the brain.
