HOW ARE ALL THE PARTS OF THE NERVOUS SYSTEM CONNECTED?
The wires of the nervous system are called neurons. The brain and the spinal cord contain billions of neurons. They send and receive information throughout your body. All kinds of messages travel in neurons. If you touch a hot stove, neurons send a pain message from your finger to your brain. Your brain then sends a message through neurons, and through your spinal cord to the muscles in your arm to pull your hand away.