respiratory system

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Across
  1. 4. muscles used for breathing
  2. 5. the air goes from the path to the lungs
  3. 6. organ at back of mouth that allows passage of food and air
  4. 9. gas needed for respiration
  5. 10. air sacs
Down
  1. 1. large tube to each lungs
  2. 2. wind pipe
  3. 3. voice box
  4. 7. the lungs is protect by
  5. 8. tubes from trachea to lungs