Respiratory System

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