| A | B |
|---|
| SaO2 | Amount of oxygen bound to Hg |
| PaO2 | Amount of oxygen dissolved in plasma |
| Ventilation | movement of gas in and out of lungs |
| Diffusion | Movement of O2 and CO2 |
| Compliance | Elasticity of lungs & thorax |
| Surfactant | helps keep alveoli inflated |
| Pleural space | Provides lubrication |
| Mucociliary Clearance | Affected most by smoking |
| Cough | Removes secretions from large passageways |
| Chemoreceptors | Respondss to changes in body pH |
