Respiratory System

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Across
  1. 1. smallest divisions of the bronchial tree
  2. 7. division of lungs
  3. 8. clusters of air sacs at the end of the bronchial tree
  4. 9. interval between the two vocal cords
  5. 11. voice box
  6. 13. chief muscle of respiration
  7. 16. breathing air into the lungs
  8. 17. the windpipe
  9. 18. pockets in the facial bones
  10. 19. separates the mouths from the nasal cavity
Down
  1. 2. exhaling out of the lungs
  2. 3. the lining encasing the lungs
  3. 4. leaf structure that opens and closes over the glottis during swallowing
  4. 5. space between the two vocal cords
  5. 6. notch in the lung where bronchi and vessels enter
  6. 7. where blood and air meet
  7. 10. main branches leading from the trachea to the lungs
  8. 12. a ridge at the lower of the the trachea, separating the openings of the two bronchi
  9. 14. a passage way for food and liquid into the digestive system
  10. 15. branching of the bronchus after entering the respective lung