Respiratory System

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Across
  1. 4. Very thin tubes
  2. 5. Thin-walled outpouching duct
  3. 11. Air-filled spaces within the nasal cavity
  4. 12. Exhalation
  5. 14. Microscopic air sacs
  6. 17. Arise from the trachea at fifth thoracic vertebra
Down
  1. 1. Opening between vocal cord
  2. 2. Branched airways leading from the trachea to air sacs
  3. 3. Hollow space behind the nose
  4. 6. Windpipe
  5. 7. Composed of bone and cartilage
  6. 8. Bones and bone processes that curl out from lateral walls
  7. 9. Soft, spongy, cone-shaped organ
  8. 10. Throat
  9. 13. Inhalation
  10. 15. Enlargement in the airway at the top of the trachea
  11. 16. Internal bone and cartilage support