The adult（成年人） brain weighs about three pounds. This doesn't seem like much, but it is one of the most1 parts in the human body. The brain is made up of so many nerve cells（神经细胞）. These nerve cells tell exactly the rest2 the human body what to do. Without a brain, we could not live.
The brain is like the body's3 . It controls the temperature of the human body and helps us breathe（呼吸）. The brain allows the body to4 , think and speak. Different parts of the brain have different jobs. The brain tells us when we are hungry and thirsty. It also5 us remember and feel.
The brain6 energy（能量） stored in the bodies as it works. 7 we need to get more energy. To keep our brains and the rest of our bodies working right, we need to eat8 foods, like vegetables, fruits and milk. We also need to keep our brains9 . Because research has shown that the less active our10 are, the less we are able to remember and do. So keep moving, thinking and doing things. It's great for your brain.
