character: Alveoli
topic: Gas Exchange in Lungs
grade: 10
subject: Biology
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character: Oxygen
topic: Role in Cellular Respiration
grade: 10
subject: Biology
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character: Carbon Dioxide
topic: Waste Removal During Gas Exchange
grade: 10
subject: Biology
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character: Hemoglobin
topic: Transportation of Gasses in Blood
grade: 10
subject: Biology
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