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