Across
- 3. superior to the first rib
- 6. hilum of the left lung
- 7. seperating the right lobe from the middle lobe
- 8. middle mediastinum of chest
- 11. removes waste products
- 12. stable pathway for respiration
- 13. between the neck and the abdomen
- 15. acts as a protective shield
- 18. site for gas exchange
- 19. lines the inner surface of thoracic cavity
Down
- 1. end of bronchioles
- 2. in the thoracic region
- 4. transports air
- 5. transports deoxygenated blood
- 9. transports food, liquid, and saliva
- 10. removes carbon dioxide
- 13. fights infection and disease
- 14. inside the lungs
- 16. lower-anterior portion of chest
- 17. contracts and flattens