Answer:
1, brain-brain is an organ that's made up of a large mass of nerve tissue that's protected within the skull.
2, spinal cord- spinal cord is a column of nerves that connects your brain with the rest of your body, allowing you to control your movements. Without a spinal cord, you could not move any part of your body, and your organs could not function.
3, nerves-Nerves are a part of the nervous system. They are primarily involved in control and the coordination of all the parts of the body
