Respiratory System

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