The average adult human brain weighs in at 1300 to 1400 grams (around 3 pounds). It is around 15 centimeters long.
On the other hand, a newborn human baby's brain weighs at about 350 to 400 grams (approx.). That is three-quarters of a pound.
>The right side of the brain controls the muscles on the left side of the body.
>The left side of the brain controls the muscles on the right side of the human body.