Across
- 2. contracts to elevate the ribs and expand thoracic cavity
- 4. has serous fluid to reduce friction between lungs and chest wall
- 5. superior tip of the lung sitting above the first rib
- 10. outer membrane layer that lines the wall of the chest cavity
- 12. act as the first structures in the respiratory area that allow for gas exchange
- 15. contracts and flattens to increase thoracic volume during inhalation
- 18. carries deoxygenated blood away from the heart and to the lungs
- 19. only on the right lung, separates the upper and middle lobes
Down
- 1. most inner membrane layer that lines the wall of the chest cavity
- 3. airway that enters the lung at the medial hilum on the left side
- 6. positioned anterior to the esophagus
- 7. tiny openings found within walls of air sacs
- 8. area on the medial surface where vessels and bronchi enter the organ
- 9. final transition tube leading into the air sacs
- 11. provides lung tissue for oxygenation on the right side only
- 13. site for T-lymphocyte maturation in the upper mediastinum
- 14. primary site where diffusion of oxygen and carbon dioxide occurs
- 16. the bone in the center of the anterior thoracic wall
- 17. the tube posterior to the windpipe
- 20. common chamber that connects individual alveoli