many neurons (nerve cells) are in the brain ?
How big?
It is believed that there are
100 billion (100,000,000,000) neurons in
human brain.
How big is the brain behind the rest of the body?
If you think an average person weighs 70 kg 1400 g and his brain, the brain is about 2% of body weight.
How long is the spinal cord and how much it weighs?
average, the spinal cord is 45 cm long in men and 43 cm in women. It weighs about 35 g.
0 comments:
Post a Comment