The Nervous System
The human brain
This what you nervous system does smelling, tasting, hearing, thinking, dreaming, breathing, heart beating, moving, running, sleeping, laughing, singing, feeling pain or pleasure. Your Nervous system is made up of your brain, your spinal cord, and an enormous network of nerves that thread throughout your body, it's the control center for your entire body. Your brain uses information it receives from your nerves to coordinate all of your actions and reactions. Without it, you couldn't exist! Brain is the main control system.
Interesting Facts:The nervous system even goes through your spinal cord
Nervs can be is thin, it can be small or three feet long.