Across
- 2. fissure Slanted groove dividing lung lobes
- 4. duct Tubes connecting bronchioles to alveoli
- 6. cavity Space between lung membranes filled with fluid
- 9. Flat bone in the center of the chest
- 12. trunk large artery leaving the right ventricle
- 13. Tiny air sacs where gas exchange happens
- 14. Main organs of respiration
- 15. wall Chest boundary made of ribs and muscles
- 16. Double membrane surrounding lungs
- 19. pulmonary vein Returns oxygenated blood from left lung
- 20. Immune organ above the heart, active in youth
Down
- 1. Fissure Separates right lung’s upper and middle lobes
- 3. Tube that carries food to stomach
- 5. brochiole Final airway branch before alveoli
- 7. Windpipe carrying air to bronchi
- 8. bronchioles small airways where gas exchange begins
- 10. Smaller airway branches in the lungs
- 11. Dome-shaped muscle aiding breathing
- 17. pulmonary artery Carries blood to left lung
- 18. Midlobe Middle section of the right lung