Across
- 1. relation to involving or requiring free oxygen.
- 5. of or situated on the Inside.
- 9. a set of metabolic reactions and processes that takes place in the cells.
- 10. relation to involving or requiring an absence of free oxygen.
- 12. principle organ in the olfactory system.
- 13. part of throat behind mouth and nasal cavity.
- 15. voice box.
Down
- 2. the outward features of something.
- 3. the process or action of exhaling.
- 4. the action of inhaling or breathing in.
- 6. the action of breathing.
- 7. passage of airway in the respiratory system that conducts air into the lungs.
- 8. the process of taking air into and expelling it from the lungs.
- 11. windpipe.
- 14. pair of spongy filled organs.