Across
- 1. Whats the system that includes the heart
- 5. Lets the blood through but not back
- 8. What's another word for breathe out
- 10. Where two bones meet
- 12. Name the organ that helps you breathe
- 13. Flexible material between
- 15. What protects vital organs and helps us move
Down
- 2. What's another word for breathe in
- 3. What is the gas that the respiratory system bring in
- 4. What's the blood vessels that comes to the heart
- 6. What's the blood vessels that goes away from the heart
- 7. Whats the system that includes bones
- 9. First part the blood enters
- 11. What connects muscle to
- 14. Name the system that is involved in breathing