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What types of fluids are around the human brain?

The fluid bathing the brain is called the cerebrospinal fluid abbreviated CSF. It serves two functions. One, it cushions the brain against injury by preventing it from banging into the inside of the skull. Second, it has a chemical composition different from blood, optimized for the special functions of nerve cells. It is made from the blood in the ventricles, the four spaces inside the brain.


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