The Respiratory System crossword puzzle

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Across
  1. 2. another name for the voice box
  2. 4. what is the name of the gas that we
  3. 9. what is another name for Pharynx
  4. 10. out
  5. 12. what is the most important organ in the respiratory
  6. 13. What is another name for the trachea
  7. 14. when we breathe in air
Down
  1. 1. Passage connecting your throat and lungs
  2. 3. how many lungs do you have
  3. 5. we use this to breathe in air
  4. 6. when we breathe out air
  5. 7. to your lungs
  6. 8. what is the name of tubes that are
  7. 11. what is the color of the lungs