Across
- 2. the cavity at the rear of the mouth
- 8. tiny air sacs in the lungs
- 9. under the trachea and lead to lungs
- 10. when exhaling, it passes outside the blood
Down
- 1. when we inhale, the pressure in the lungs
- 3. it filters the air we breathe
- 4. it damages the respiratory system
- 5. the earthworms breathe through their
- 6. when we exhale, the diaphragm
- 7. when inhaling, oxygen passes into