1. brain

2. spinal cord

3. nerves

The main function of the nervous system is to help all parts of the body communicate so that the body is in good condition.

Three fun facts about the nervous system are

1. There are more than 100 billion cells in the human body.

2. The brain and spinal cord form the central nervous system.

3. Nervous changes are rapid but not as rapid as electricity.

The nervous system is important because the body needs alerts and sings that it is not okay so it can change back to normal