BRAINCAKEExpiration
Expiration is a largely passive process that does not require much energy.
1. The external intercostal muscles relax. The internal intercostal muscles contract. The ribs are pulled downwards and inwards.
2. The diaphragm relaxes causing it to dome upwards, pushed up by the contents of the abdomen.
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More in Exchange of Gases
- The Human Gas Exchange System
- The Lungs
- Mechanism of Breathing
- Inspiration
- Alveoli
- Role of Alveoli in Gas Exchange
- Correlation and Causation
- Risk Factors for Lung Disease
All 28 lessons in Exchange of Gases · All AQA AS-level Biology topics