The Respiratory System

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Across
  1. 1. the movement of a substance
  2. 4. pipe that sends air to the lungs
  3. 6. protects the organs
  4. 7. keeps the body and cells alive
  5. 8. carry and return blood to the heart
  6. 10. splits the air into each lung
Down
  1. 1. it inflates and deflates the lungs
  2. 2. what use to smell
  3. 3. dioxide the waste that is exhaled
  4. 5. air sacs
  5. 9. collects air