Across
- 2. Little hairs inside bronchial tubes that help remove unwanted matter from the lungs
- 5. Harmful waste gas that we need to get rid of
- 9. Invisible gas that we need for our cells to work properly
- 10. SYSTEM Body system responsible for breathing
- 11. Main function of the respiratory system
- 12. The windpipe
- 13. Help keeps your lungs healthy
Down
- 1. Dome shaped muscle
- 3. Small passages (look like tree branches) inside the lungs
- 4. Tiny sacs surrounded by blood vessels
- 6. Organs where the air exchange happens
- 7. Place where air can enter
- 8. Damages your lungs
- 10. Bones that protect the lungs