Across
- 1. produces melatonin that helps you sleep at night and wakes you up in the morning
- 6. is a bone and protects the brain
- 9. controls the right side of the body
- 11. also called neurons
- 13. controls your posture, balance, and coordination
- 14. controls the amount of light that will enter through the pupil
- 15. controls the left side of the body
- 17. made up of bundles of nerves that carries messages from the brain to all the parts of the body
- 19. controls voluntary actions like sitting, smiling, and reaching
- 20. weigh about 3 pounds and the leader of the body
Down
- 2. controls involuntary actions like breathing and heartbeat
- 3. controls thinking and muscles
- 4. ______ are connected to every part of the body
- 5. a nerve that send images from the eyes to the brain
- 7. controls your heart, lungs, and important reflexes
- 8. messages from neurons
- 10. vision that you are not focused on
- 12. eyes, ears, nose, mouth, and skin
- 16. a thin transparent layer which covers the round color part of the eye
- 18. in the center of the iris