Respiratory System

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Across
  1. 2. 2 holes that act as doors to help breathing
  2. 4. large airways that allow air in and out of our lungs
  3. 6. a cage made out of bones that help protect your organs
  4. 7. dioxide an element we exhale
  5. 8. a system of organs and tissues that helps you breathe
Down
  1. 1. the process of breathing
  2. 3. the “engine” that maintains breathing
  3. 5. an element we inhale