Across
- 2. transfer
- 4. rise over run
- 8. the system
- 11. staying alive
- 12. state of matter
- 13. good stuff
- 14. is thicker than water
Down
- 1. air bags
- 2. prevents choking
- 3. important
- 5. force of air
- 6. two of something
- 7. waste
- 9. gas exchange
- 10. smaller than a river