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Hello students, in this question they have asked to explain about the flow of csf around the brain and spinal cord.
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Csf stands for cerebro spinal fluid.
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This csf is produced in the ventricles of the brain specifically lateral third and fourth ventricles.
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First from the lateral ventricles the cerebro spinal fluid flows through interventricular foramina into the third ventricle.
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Then in the third ventricle this csf is further produced and flows through cerebral aqueduct into fourth ventricle.
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Then in fourth ventricle this csf exits through three openings, the median aperture and two lateral apertures.
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Then csf flow into the subarachnoid space which surrounds the brain and spinal cord.
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Csf then circulates around the brain and spinal cord providing nutrients and removing waste.
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Eventually this csf is reabsorbed into the bloodstream through structures called subarachnoid villi which are located in the dural sinuses.
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From there this csf joins the bloodstream and it is carried away from the cns.
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This is the entire pathway of the csf flow...