How does all this happen? Of course, you know your brain controls your body, but how does it know what your eyes see, or make your legs run? Your brain is made up of billions of cells called neurons. You realize it is time for dinner, so you rush back home. Then suddenly, you hear your mother’s voice calling your name. You catch the ball, gripping it with your fingers.
You sprint to catch it, pumping your legs as hard you can.
You see the ball flying toward you, just five feet away.
