Brain

by Ron Weasley
(Starksboro vt)

When you think of moving your arms the the part of your brain that moves your arms we'll be activated.

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Here are some of the interesting facts and figures about the human brain.

Your brain weighs about 3 pounds. The typical brain is about 2% of a body’s weight but uses 20% of its total energy and oxygen.Your brain 73% consist of water. It takes only 2% dehydration to affect your attention, memory and other cognitive skills.

No one can tell exactly, but the latest estimate is that our brains contain roughly 85 000 000 000 brain cells