How the Brain Works

Your brain is the most complex organ in your body. It controls everything you do, from thinking and remembering to moving and breathing. The brain is made of about 86 billion nerve cells called neurons. These neurons send electrical signals to each other at incredible speed.

Parts of the Brain

The brain has different parts that do different jobs. The cerebrum is the biggest part and handles thinking, learning, and memory. The cerebellum at the back helps with balance and coordination. The brain stem connects the brain to the spinal cord and controls things you do without thinking, like breathing and your heartbeat.

How Neurons Communicate

Neurons send messages using electrical and chemical signals. When you touch something hot, neurons in your finger send a signal up your arm to your brain. Your brain processes the message and sends a signal back to pull your hand away. All of this happens in a fraction of a second.

Fun Facts

• Your brain uses about 20 percent of your body's energy even though it is only about 2 percent of your body weight.
• Brain signals can travel at speeds up to 268 miles per hour.
• Your brain generates enough electricity to power a small light bulb.

Did You Know?

Your brain is more powerful than any computer ever made. It can process information, recognize faces, understand language, and feel emotions all at the same time. No computer can match all those abilities!