The Lungs. Gas exchange tissue CO 2 O2O2 Lung compartments air compartment vascular compartment.

The Lungs

Gas exchange

tissue

CO2 O2

Lung compartments

air compartment

vascular compartment

The airway

tracheabronchusbronchiolealveoli

Bronchus

Proximal bronchus

PV

The distal airway

single alveoli

terminal bronchiole

alveolar duct alveolus

The distal airway

Lung airflow zones

Rigid (150 ml) ai

rway

alveolielastic (7000 ml)

Poisseuille: F = (Pout – Palv)/R

airw

ay

alveoli

0

<0

airflow

Pout

Palv

air

Balloon-in-box model of lung

lungchest wall

pleural space

diaphragm

Breathing

expiration inspiration

air