Edexcel IGCSE Biology 2.47 Ventilation muscles
Practise explaining inhalation and exhalation using diaphragm movement, intercostal muscles, thorax volume, pressure and model apparatus.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- link diaphragm contraction and rib movement to increased thorax volume and lower pressure
- interpret lung volume graphs to explain inhalation, exhalation and muscle action
- evaluate bell-jar models by comparing rubber sheets, rigid jars, ribs and intercostal muscles
2.47 Ventilation muscles question 1
The diagram shows parts of the human respiratory system with some structures labelled.
Explain how contraction of the diaphragm causes air to move into the lungs.
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