Alveolar Sac Model

Key:

1. Cartilage of a Tertiary bronchus
2. Bronchiole
3. Respiratory bronchiole
4. Alveolar duct
5. Alveolar sac
6. Alveoli
7. Terminal bronchiole
8. Alveolar ducts
9. Alveoli with capillaries surrounding them
10. Alveoli showing elastic fibers surrounding them

Video: