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BRAIN 2
An adult brain weighs about 3 lbs. and contains over 100 billion nerve cells or neurons, which happens to be about as many stars as in our universe. The human brain is made of mostly water, and is supported by the scalp and cranium. It is even cushioned in a special fluid which is produced by a gland in the brain. If it were not protected by these structures it would sag, and slump. [CG] {NR}

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