Across
- 3. carries air in and out of your lungs
- 5. protects the organs
- 6. a tiny branch of air tubes in the lungs
- 7. a blood vessel
- 9. helps you smell
- 11. carries air into your lungs
- 12. A pair of organs in your chest
Down
- 1. separates the lungs from your stomach
- 2. co2
- 4. the process where molecules move
- 8. They allow oxygen to pass into your blood
- 10. it gives energy to the cells