Respiratory System

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Across
  1. 4. the gas you need to get rid of to survive
  2. 5. the tiny air sacs that allow for oxygen to transfer into the blood
Down
  1. 1. tubes that bring air into each lung from the trachea
  2. 2. the gas you need to survive
  3. 3. airway that connects the mouth down to the lungs
  4. 6. the main organs in the respiratory system