The Lungs

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Across
  1. 3. Gas produced by body cells when oxygen and carbon atoms from food combine
  2. 7. Thin hairs attached to the mucous membrane epithelium lining the respiratory tract
  3. 10. Throat
  4. 13. Smallest branches of the bronchi
  5. 14. Lower portion of the lung
  6. 15. Essential parts of the lung, responsible for respiration
  7. 20. One of a pair of almond shaped masses of lymphatic tissue in the oropharynx
  8. 24. Voice box
  9. 25. Double layered membrane surrounding each lung
  10. 26. Air sac in the lung
  11. 27. Slit-like opening to the larynx
Down
  1. 1. Breathing in
  2. 2. Inner layer of pleura closer to the lung tissue
  3. 4. Muscle separating the chest and abdomen
  4. 5. Lid-like piece of cartilage that covers the larynx
  5. 6. Breathing out
  6. 8. Space between the folds of the pleura
  7. 9. Gas that makes up 21 percent of the air
  8. 10. One of the air cavities in the bones near the nose
  9. 11. Midline region where the bronchi, blood vessels and nerves enter and exit the lungs
  10. 12. Division of a lung
  11. 14. Branch of trachea that is a passageway to the lung
  12. 16. Openings through the nose carrying air into the nasal cavities
  13. 17. Process of moving air into and out of the lungs
  14. 18. Outer layer of pleura lying closer to the ribs and chest wall
  15. 19. Region between the lungs in the chest cavity
  16. 21. Tip or uppermost portion of the lung
  17. 22. Lymphatic tissue in the nasopharynx
  18. 23. Windpipe