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Anatomy of the ventricular system
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An adult human brain weighs about 1.5 kgs, but we don’t really feel it weighing us down!
CSF doesn’t only fill the ventricles, but also the subarachnoid space, which surrounds the brain and spinal cord. This way, CSF cushions and protects the brain from head trauma, and it also provides buoyancy so that the brain doesn’t compress blood vessels and cranial nerve roots against the cranium. It also provides protection against sudden intracranial pressure changes.
CSF can also transport nutrients for nervous tissue,
as well as remove metabolic waste products.
It can also transport hormones, and
influence the brain's excitability by regulating its ionic composition. .
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