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Across 1. bubbling sound heard at the bases of the lungs in pneumonia 2. area of the brain that controls respiration 3. lung cancer from filtered cigaretes 4. high pitched sound hear in asthma 9. what is an example of Boyle's law 13. structure that covers the airway 14. medication that opens the airway 16. difficult breathing 17. secreted by the alveoli to keep lungs moist 19. a genetic condition in which mucous is too thick 23. the act of inspire and expire 26. where is air warmed and humidified 27. voice box 28. in CF when sweat glands become clogged with mucous 30. elbows out, pursed lip breathing 32. cure for CF

Down 1. tiny hairs that sweep up pollutants in the lungs and you cough 5. what are hairs in the nose that catch large particles of dust 6. first structure of the respiratory system 7. condition of increased CO2 8. nerve that give sense of smell 10. when O2 exchanges for CO2 11. when bronchiole close from swelling due to reaction to pollutants, causing coughing and wheezing 12. what are cells that make mucous in the nose 15. ph of 7.20 18. secondary bronchi split into 20. where external respiration occurs 21. heard in life threatening allergic reactions 22. ph is too basic 24. malignant lung cancer 25. what states the volume of gas is inversely 28. what is the usual cause of emphysema 29. wind pipe 31. a name that describes an obstruction in the air passages