Across
- 2. Known as air sacks
- 5. two tubes that split off of the trachea one going to each lung
- 6. Takes in oxygen, releases carbon dioxide
- 7. Makes vibrations to cause noise
- 9. A waste product of the body
- 10. controls air movement into the body and CO2 out of the body
- 11. you have two of these and they are a big part of this system
Down
- 1. A part of the lungs that branches off like tree branches
- 3. The muscles that allows the lungs to fill up with air
- 4. your windpipe
- 6. your voice box
- 8. Is smaller than the other to make room for the heart