Across
- 4. Contains the vocal cords
- 5. Condition in which airways are narrow
- 6. Cells that have no nucleus and are disk shaped
- 7. Cells that keep you healthy by fighting pathogens
- 8. Dome shaped muscle under the lungs
- 11. Branch into smaller tubes called bronchioles
- 15. Gas that is exhaled
- 16. Condition that occurs when alveoli are damaged
- 18. Tiniest type of blood vessel
- 19. Gas that is inhaled
Down
- 1. Pieces of larger cells found in bone marrow
- 2. Organs where oxygen is inhaled and carbon dioxide is exhaled
- 3. Closed circulatory system
- 9. Small air sacs in the lungs
- 10. System that the lungs belong to
- 12. Inflammation of the lungs caused by bacteria or viruses
- 13. Blood vessel that carries blood back to the heart
- 14. Blood vessel that carries blood away from the heart
- 17. Extends from the mouth to the larynx