Across
- 5. The physical process of exchange of gases in organisms
- 7. The flow of the respiratory current out of the organism
- 8. The term used to describe one inhalation and one exhalation
- 9. Respiration in the presence of oxygen
Down
- 1. A mechanical system in a building that provides fresh air
- 2. Human's air passage
- 3. Gas formed by breathing out
- 4. Process in which food is broken down, and energy is released
- 6. Taking in of air rich in oxygen