Across
- 4. the scientific name for air sacs
- 6. the two tubes that connect to your lungs
- 10. connects your lungs to the capillaries (bloodstream)
- 11. when you hold your breath, your lungs are full of this
- 13. the scientific name for windpipe
- 14. what you do when your diaphragm goes up
- 15. this organ protects your lungs from dust
- 16. carries oxygen
- 17. something that cells need
Down
- 1. tubes that connect to your air sacs
- 2. something you do that makes you need more oxygen
- 3. a pair of thin and soft organs
- 5. hard stuff that covers your lungs
- 7. goes from the mouth to the lungs
- 8. the main function of the respiratory system
- 9. makes your lungs inflate and deflate
- 12. to fill your lungs with air