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Biology
Breathing and Exchange of Gases
53 questions from 29 papers, each with its answer.
- 53 questions
- 29 papers
- 1.5% of Biology
Respiratory volumes – residual volume
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Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of:
Residual volume keeps alveoli open.
The volume of air remaining in the lungs after forceful expiration is the residual volume, which prevents the alveoli from collapsing.
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