CAIE IGCSE Biology EXTENDED 11.1.8 Ventilation mechanics
CAIE IGCSE Biology EXTENDED 11.1.8 Ventilation mechanics
Practise explaining ventilation by linking muscle action, rib and diaphragm movement, thorax volume and pressure changes.
How this is tested
- sequence inspiration from muscle contraction to increased thorax volume and falling pressure
- compare inspiration and expiration using ribs, diaphragm, intercostal muscles and pressure
- interpret diagrams or tables showing how thorax volume and lung pressure change