Across
- 3. breathe through both lungs and skin
- 4. it is a muscular sheet in lungs
- 6. breathe through gills
- 8. breathe through spiracles
- 9. breathe through lungs
- 10. respiration without oxygen
Down
- 1. breathe through skin
- 2. breathe through stomata
- 5. respiration with help of oxygen
- 7. it is a wind pipe in the respiratory system