respiratory system
Across
- 5. what you breath out
- 8. splits the air in to both your lungs
- 10. air collecting organ
- 11. tubes that connect bronchus to the alveoli
- 12. how oxygen enter your blood stream in a way
Down
- 1. vessels that return blood to the heart
- 2. what air travels though to get to lungs
- 3. lung inflator and deflator
- 4. it can be used as energy for the cells
- 6. bones that protect your organs
- 7. a piece if cartilage that you breath from
- 9. how your oxygen get in your blood stream