Respiratory System Crossword Puzzle

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Across
  1. 3. Rounded point at the top of the lung
  2. 7. Coughing up blood
  3. 9. Outer lung surface
  4. 12. Adam's Apple, _______ cartilage
  5. 13. Where vessels and primary bronchus enter and exit the lung
  6. 14. Bluish discoloration due to lack of oxygen
  7. 16. Pairs of paranasal sinuses
Down
  1. 1. Voicebox
  2. 2. Lobes in the left lung
  3. 4. Covers the larynx when swallowing
  4. 5. Muscle separates the thorax from the abdomen
  5. 6. Pairs of tonsils
  6. 8. Traveling clot
  7. 10. Part of the innate immune system
  8. 11. Average number of alveoli
  9. 15. Prefix meaning straight or upright