Across
- 4. where air enters the body
- 7. air flows down to the lungs, also called the windpipe
- 10. the exchange of gases between the body and air
Down
- 1. organs that fill with air
- 2. dioxide a gas the body gives off as waste
- 3. muscle below the lungs that contracts and relaxes
- 5. colorless, odorless gas necessary for almost all life
- 6. air travels through down to the voice box
- 8. allows people to speak. Attached to the trachea
- 9. produces mucus to trap dirt and dust