1
														2
						3		4
																			5
						6					7		8		9
													10
							11
																		12
								13
						14												15
																		16
	17
									18							19		20			21
22											23
			24											25					26
																			27
		28									29		30
				31
																			32	33
34
																			35
				36
																37

Across 2. lung; air 3. mucus 6. nose 10. larynx 11. dust 12. oxygen 14. lung; air 16. cough 17. paralysis 20. lobe 22. blue 23. bronchus 24. epiglottis 25. sinus 27. nose 29. CO2; carbon dioxide 31. plug 32. smell 34. diaphragm 35. involuntary muscle contraction 36. coal 37. breathing

Down 1. lung 4. cyst; bladder 5. chest 7. bronchus 8. alveolus; air sac 9. trachea; windpipe 13. air 14. pharynx 15. incomplete 17. spitting 18. cortex; outer region 19. voice 21. oxygen 23. bronchiole 26. straight; upright 28. breathing 30. pleura 33. wall