Our brain is like a message center. Each second the brain receives more than a million message from our body and know what to do with them. people think that the weight of the brain tell how intelligent you are, but this isn't true. Albert Einstein's brain weighed 1375 grams, but less intelligent prople may have heavier brain. What is important is the quality of the brain. The brain has two haves - the right brain and the left brain. Each half is about the same size. The right half controls the left side of the body, and the left half controls the right side of the body. One half is usually stronger than the other. One half of the brain become stronger when you area child and usually stays the stronger half for the rest og your life.
The left side of the brain controls the right side of the body, so when the left brain is stronger , the right hand will be strong and the person may be right-handed. That left half controls speaking, so a person with a strong left brain may become a good speaker, professor, lawyer, or salesperson.