Across
- 2. Fermentation takes place with the help of
- 3. Respiration that takes place in absence of oxygen
- 7. The colour of lungs
- 8. Process of taking in oxygen
- 9. The tiny openings on leaves of plants for the exchange of gases
- 10. Large muscular sheet forms the floor of chest cavity
Down
- 1. The network of air tubes in insects-
- 4. Process of releasing energy in body
- 5. During exhalation, the diaphragm moves
- 6. The organ through which earthworm breathes