Respiratory System Crossword

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950
Across
  1. 1. maximum volume of air that can be exhaled after maximal inhalation
  2. 5. muscles that elevate ribs during inspiration
  3. 6. fluid that reduces friction between pleural membranes during breathing
  4. 7. smallest conducting airways before gas exchange regions
  5. 9. primary muscle of respiration separating thoracic and abdominal cavities
  6. 11. condition caused by excessive CO2 lowering blood pH
  7. 12. elastic cartilage flap that prevents food from entering the airway during swallowing
  8. 16. bacterial infection producing granulomas in lung tissue
  9. 18. topmost portion of the lung extending above the first rib
  10. 19. process of drawing air into the lungs
  11. 21. volume of air inhaled or exhaled during a normal breath
  12. 23. first branches of the trachea entering the lungs
  13. 25. muscular passageway that conducts air from the nasal cavity to the larynx
  14. 26. folds of mucous membrane that vibrate to produce sound
  15. 28. microscopic air sacs where oxygen and carbon dioxide are exchanged
  16. 30. opening between the vocal cords through which air passes
  17. 31. paired organs responsible for gas exchange in the thoracic cavity
  18. 32. chronic inflammatory airway disorder causing reversible bronchoconstriction
  19. 33. major form in which carbon dioxide is transported in blood
  20. 35. sensory receptors detecting changes in blood gases and pH
  21. 37. inflammation of bronchial tubes leading to mucus buildup
  22. 38. phospholipid substance that reduces surface tension in alveoli
  23. 39. physical movement of air between atmosphere and alveoli (either in or out)
  24. 41. enzyme that catalyzes conversion of CO2 and water to carbonic acid
  25. 43. infection causing inflammation and fluid in alveoli
  26. 45. pleural layer covering the lung surface
  27. 46. pressure exerted by an individual gas in a mixture
  28. 48. movement of gases from higher to lower concentration
  29. 49. middle portion of the pharynx behind the oral cavity
  30. 50. additional air that can be inhaled after a normal inspiration
Down
  1. 2. total volume of air the lungs can hold
  2. 3. network of capillaries surrounding alveoli for gas exchange
  3. 4. depression on the lung surface where bronchi and vessels enter
  4. 8. condition caused by excessive CO2 loss raising blood pH
  5. 10. air remaining in lungs after maximal exhalation
  6. 13. fluid accumulation in lung tissue impairing gas exchange
  7. 14. additional air that can be exhaled after a normal expiration
  8. 15. lobar branches of the bronchi supplying each lung lobe
  9. 17. hemoglobin bound to oxygen in red blood cells
  10. 20. small airway branches lacking cartilage that regulate airflow
  11. 22. chronic disease involving destruction of alveolar walls
  12. 24. bronchioles containing alveoli where gas exchange begins
  13. 25. pleural layer lining the thoracic cavity wall
  14. 27. double-layered serous membrane surrounding the lungs
  15. 29. cartilaginous structure containing the vocal cords and connecting pharynx to trachea
  16. 34. rigid air-conducting tube reinforced by C-shaped cartilage rings
  17. 36. process of expelling air from the lungs
  18. 40. lower region of the pharynx leading to the larynx and esophagus
  19. 42. air-filled cavities in skull bones that lighten the skull and help resonate voice
  20. 44. upper region of the pharynx located behind the nasal cavity
  21. 47. primary airways branching from the trachea into each lung