The average brain weighs 3 pounds. The human head weighs 10 pounds.
As we age, the brain loses 1 gram of weight per year.
The brain is 75 percent water.
The brain has 100 billion neurons (nerve cells). There are no pain receptors, so the brain cannot actually feel pain! There are tissues, nerves, and blood vessels around the brain that can feel pain, and that is what causes headaches.
Nerve impulses in the brain and nervous system travel at 250 miles/hour.
The brain at birth is almost the same size as the adult brain.
The brain uses 20 percent of the body’s oxygen. If the brain doesn’t get oxygen for 5-10 minutes, brain death results.
The brain uses of 300 calories a day! If a person is in very active thought, it can burn an additional 50 calories a day.
The brain continues to send out electric signals for up to 37 hours after death!
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