The brain is a ____ organ in your head that ____ you to think, learn, create, and feel emotions. It also ____ important body functions like breathing and pumping blood. You see something about to fall and catch it before it hits the ground. This is your brain at work. The brain reads ____ from ____ like the eyes to ____ quickly what the body needs to do. It then orders your ____ to ____ to the situation, almost immediately. Tiny chemical and electrical signals ____ down tiny ____ highways. They allow your brain to download, ____, and react to the information it ____. Have you ever touched something hot and moved your hand away immediately? Sensory neurons in your skin ____ this information to your ____ and brain. The brain then uses motor neurons ____ a message to your hand, telling it to move quickly. When you practice something many times, your brain keeps sending ____ along pathways of ____, again and again. This forms new ____. Exercise makes your body ____ a chemical that makes the brain more ____ to learning. That's why taking a break to do some physical activity can help you if you are stuck on a problem.

Brain

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