THE RESPIRATORY SYSTEM
Across
- 4. muscle that helps lungs get air in and out of the body
- 6. what we breathe
- 7. the small bulb sacs at the end of bronchioles
- 9. when the body takes in oxygen and gets rid of carbon dioxide
- 11. the main part of the respiratory system
Down
- 1. causes very bad disease in the lungs
- 2. tubes that bring air to and from the lung3ls
- 3. also called the windpipe
- 5. a harmful waste gas; carbon dioxide is an example
- 8. also called the voice box
- 10. one of two places where air enters your body