Across
- 3. blood vessels surrounding the alveoli
- 4. protects lungs from getting punctured
- 7. mechanical process of inhaling and exhaling air
- 8. the simplest form of sugar
- 10. branch of air tubes in the lungs
- 12. structure where gas exchange happens
- 13. incomplete respiration due to absence of oxygen
Down
- 1. site where respiration happens
- 2. process of releasing energy from food
- 5. one of the organs for the respiratory system
- 6. one of the product of respiration
- 9. gas that is needed for respiration process
- 11. also known as trachea