character: Alveoli
topic: Gas Exchange Mechanism
grade: 11
subject: Biology
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character: Respiratory System
topic: Role of Alveoli in Gas Exchange
grade: 11
subject: Biology
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character: Capillaries
topic: Oxygen and Carbon Dioxide Transport
grade: 11
subject: Biology
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character: Hemoglobin
topic: Carrying Oxygen and Carbon Dioxide
grade: 11
subject: Biology
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