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Made up of the brain and the spinal cord it is an enormous network of nerves that thread throughout your body, the control center for your entire body! The brain uses information it receives from your nerves to coordinate all your actions and reactions. Without the nervous system you could not exist.
It is sort of electricity, neurons are very small and some can be up to three feet long! All of them are shaped somewhat like flat stars which have been pulled and are similar to fingers, where the fingers of one neuron almost reach to the next neuron.