Respiratory System

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Across
  1. 2. membrane surrounding each lung
  2. 4. organs containing bronchial tree
  3. 6. opening to throat
  4. 7. one leads to left lung and one to the right lung
  5. 9. contains bronchi and bronchioles
  6. 12. stimulates diaphragm
  7. 15. first part of pharynx
  8. 18. cavity where air enters body
  9. 19. protect body from invaders
Down
  1. 1. contains nasal cavity
  2. 3. where gas exchange occurs
  3. 5. third part of pharynx
  4. 8. second part of pharynx
  5. 10. brings air to chest
  6. 11. muscle that expands thoracic cavity
  7. 13. covers windpipe during swallowing
  8. 14. warms and filters air
  9. 16. voice box
  10. 17. hairs in nose that filter debris