Respiratory System

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Across
  1. 5. sinus
  2. 6. sinus
  3. 8. nose
  4. 9. septum
  5. 12. carbon dioxide
  6. 13. breathing
  7. 14. sternum
Down
  1. 1. voice box
  2. 2. nose
  3. 3. oxygen
  4. 4. carbon dioxide
  5. 7. chest
  6. 10. windpipe
  7. 11. lobe
  8. 12. ribs