Across
- 5. the gas that we breathe OUT
- 7. the part of the airway also known as the windpipe that feels bumpy due to cartilage
- 8. the gas that we breathe IN
Down
- 1. the smallest part of the respiratory system where gas exchange occurs
- 2. how the muscle allows lungs to expand and collect air
- 3. how the muscle allows lungs to force air out of the lungs
- 4. large tubes of the airway that connect trachea to left and right lungs
- 6. the muscle that helps us inhale and exhale