The Respiratory System crossword puzzle

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