The Respiratory System

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Across
  1. 2. gets the fresh air
  2. 3. substances have to pass through the cell bronchioles like a tree limb
  3. 6. a tube that connects your larnyx
  4. 8. gives fresh air into your body
  5. 10. connect the arteries and the veins
  6. 11. protects your heart and lung
Down
  1. 1. works to trap heat close to Earth
  2. 4. where people breath from
  3. 5. carries air into your lung
  4. 7. lungs and the blood exchange
  5. 9. contracts and flattens