| A | B |
|---|
| Upper respiratory tract | The part of the respiratory system containing the nasal cavity, paranasal sinuses, and pharynx |
| Lower respiratory tract | The part of the respiratory system containing the larynx, trachea bronchi, and lungs |
| Ventilation | The process of getting air into the lungs and back out |
| External respiration | The process of O2 and CO2 exchange between the alveoli and the blood |
| Internal respiration | The process of O2 and CO2 exchange between the body cells and the blood |
| Pneumothorax | Air in the pleural cavity, which leads to a collapsed lung |
| Surfactant | A molecule with a hydrophilic end and a hydrophobic end |
| Compliance | The ease with which the lungs inflate |
| Aspirate | To take in by means of suction |
| Tidal volume | The volume of air inhaled or exhaled during normal breathing |
| Functional residual capacity | The volume of air left in the lungs after a normal exhalation |
| Total lung capacity | The maximum volume of air contained in the lungs after a maximal inhalation |
| Residual volume | The volume of air left in the lungs after a maximal exhalation |
