Across
- 2. gas exchange happens
- 3. is a dome shaped muscle works with lungs to get air in and out
- 6. filters and moistens the air
- 7. is passage way for air
Down
- 1. are tiny air sacs that exchange the air
- 2. produces sound and called as voice box
- 4. is the passageway for air , food and liquid
- 5. air moves down through