Protection of The Brain
The brain and spinal cord are covered by a series of tough membranes called meninges, which protect these organs from rubbing against the bones of the skull and spine. The cerebrospinal fluid within the skull and spine is found between the pia mater and the Arachnoid and provides further cushioning.
The Cerebrospinal Fluid that is produced in the ventricular system has three main purposes: buoyancy, protection, and chemical stability. The protection purpose comes into play with the meninges: pia mater, and the Arachnoid layer. The CSF is there to protect the brain from striking the cranium when the head is jolted. CSF provided buoyancy and support to the brain against gravity. The buoyancy protects the brain since the brain and CSF are similar in density; this makes the brain float in neutral buoyancy, suspended in the CSF. This allows the brain to attain a decent size and weight without resting on the floor of the cranium, which would kill nervous tissue.
Read more about this topic: Ventricular System
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—Margaret Mead (1901–1978)
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“Thou hast no more brain than I have in mine elbows.”
—William Shakespeare (1564–1616)