Across
- 2. muscle that inflates and deflates the lungs
- 4. A gass that leaves our body
- 7. Small air tubes that connect bronchus and alveoli
- 8. The pipe that sends air to the lungs
- 10. Provides air for the respiratory system
- 11. Blood vessels throughout the body
Down
- 1. Movement of molecues from high to low concentration
- 3. The organ that collects air
- 5. The gass that one breathe's for energy
- 6. Air sacs that exchange oxygen and carbon into blood
- 7. end of the trachea, splits the air into each lung
- 9. A protective cage around the lungs