Across
- 3. what sends signals to the brain
- 8. biggest bone in your body
- 10. protects brain
- 11. Carries large amount of fast flowing blood
- 12. Largest muscle on your body
- 13. runs through your back
- 14. you intake oxygen and relies carbon dioxide
- 16. fights infection
- 17. bones protecting vital organs
- 19. flexes when you bend your elbow
- 20. What you breath out
Down
- 1. connects nerve to the brain
- 2. every nerve makes this
- 4. pulls bones to give movement
- 5. used to run and jump
- 6. muscle that controls nervous system
- 7. What you breath in
- 9. carries oxygen in blood
- 15. carries blood
- 18. pumps blood and oxygen through body