Human Machine

2. a part of the body that attaches to bones and allows the body to move
4. a large muscle in the upper arm
5. the parts of the body that carry signals from the brain to muscles
7. the dark opening in the center of the eye
10. the parts of the body that carry signals from one part of the body to another part
11. a clear object that changes the direction of light as it passes through
12. the clear layer in front of the eye
14. the parts of the body that carry signals from the senses (eyes, ears, mouth) to the brain
15. the hard parts inside many animals that help give their bodies shape
16. a part of the body where two bones come together and can bend

1. the back of the eye that senses light and sends messages to the brain
3. the brain and all the nerves in the body
6. a group of things that affect each other and function as a whole
8. a part of the body that attaches to bones and allows the body to move
9. a part of the body that attaches muscle to bone
13. the colored part of the eye that is shaped like a donut
15. a part of the body that receives, processes, and responds to signals from nerves