Respiratory system

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Across
  1. 3. main airways that distribute gases in your lungs
  2. 4. tube that air flows down
  3. 6. other entrance for air
  4. 7. small cartilage,main airway
Down
  1. 1. main organ for breathing
  2. 2. muscle that helps assist with breathing
  3. 5. tiny air sacs that absorb oxygen