The Respiratory System

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Across
  1. 2. Under the lungs
  2. 4. Helps you breathe
  3. 5. What chemical do you want OUT of your body?
  4. 6. What protects your lungs?
Down
  1. 1. What divides off from bronchi/bronchus
  2. 3. What conducts air to your lungs?
  3. 7. Tiny air sacs of the lungs which helps CO2 exchange