Ralph Hutchings

Image 45 of 74
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Human brain, lateral surface, with the arachnoid mater and external cerebral veins intact. The brian is showing the cerebrum, cerebral arteries, cerebellum, and hindbrain. The cerebellum is involved with balance and control of the muscles. The brain contains more than 300 billion neurons and is composed mainly of gray matter which originates and processes nerve impulses and white matter which transmits the impulses.