Respiratory Crossword

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Across
  1. 1. before you inhale the diaphragm must move in this direction
  2. 4. produces mucus
  3. 6. the muscle involved with breathing
  4. 9. respiration, gas exchange between blood and cells
  5. 10. respiration, just breathing
  6. 12. divides the nasal cavity
  7. 13. moves mucus back up the mouth
  8. 15. chemical in blood that carries oxygen
  9. 17. when the trachea branches it becomes this
  10. 18. which lung has three lobes
  11. 19. air sacs in the lungs
Down
  1. 2. what you should breathe through
  2. 3. chamber at the back of the throat
  3. 5. the voice box
  4. 7. part of brain that controls breathing
  5. 8. the respiratory organ
  6. 11. artery leading to the lungs
  7. 14. keeps food out of the lungs
  8. 16. windpipe