Respiratory System

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Across
  1. 3. is above your mouth
  2. 5. it has some "rings"
  3. 8. you have two of them
  4. 9. similar to respiration
Down
  1. 1. we must breathe it out.
  2. 2. respiratory movements
  3. 4. similar to breathing
  4. 6. exchange of gases
  5. 7. we need it to survive