1
The system of nerves that send messges for controlling movement and feeling between the brain and body
2
The group of nerves which runs through the center of the spine and carries messages between the brain and body
3
The process by which food is changed to a simpler form after it is eaten
4
To remove something that is not wanted or needed
5
To work or operate
6
A substance that plants, animals, and people need to live and grow
7
A part of the body that has a particular function
