1. The Lungs

2. Gas exchange tissue CO 2 O2O2

3. Lung compartments air compartment vascular compartment

4. The airway trachea bronchus bronchiole alveoli

5. Bronchus

6. Proximal bronchus PV

7. The distal airway single alveoli

8. terminal bronchiole alveolar duct alveolus The distal airway

9. Lung airflow zones Rigid (150 ml) airway alveoli elastic (7000 ml)

10. Poisseuille: F = (Pout – Palv)/R airway alveoli 0 <0 air flow Pout Palv

11. air Balloon-in-box model of lung lung chest wall pleural space diaphragm

12. Breathing expirationinspiration air