Lower Respiratory Puzzle

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Across
  1. 4. from the larynx to the bronchii, a thin pipe
  2. 5. flexible cage, protector of organs in same area
  3. 8. hollow, muscular tube, at the back of the throat
  4. 9. anchor of the lungs, entry and exit
  5. 11. contains fluid, allows smooth breathing
  6. 14. an utterly tiny lobe, against the horizontal fissure
  7. 15. forms a protective lining within the thoracic cavity
  8. 17. posterior to the sternum, median to the lungs
  9. 18. conforms to the diaphragm, at the bottom
  10. 19. three layers, in between each rib
  11. 20. anterior to the heart, a flat bone
Down
  1. 1. small compartment, holds connective tissue and fat
  2. 2. conical tip, forms its cone shape
  3. 3. only on the right lung, divides it in two
  4. 6. centerpiece of the body, blood pumper
  5. 7. carries air from trachea into LEFT lung
  6. 10. tiny sac inside of a larger sac, exchange gasses
  7. 12. the prime driver for inhaling and exhaling
  8. 13. provides a smooth, protective covering of lungs
  9. 16. the final passage before gas exchange