Across
- 3. The process of breathing out air
- 4. Discovered oxygen
- 6. respiratory organ of the frog
- 7. baby frogs
- 8. The process of breathing in air
- 9. dioxide gas we exhale
Down
- 1. respiratory organs of the fish
- 2. helps you be fit
- 5. Human respiratory organ
- 6. Helps in exchange of gases in plants