character: Oxygen Molecule
topic: Cellular Transporter
grade: 10
subject: Biology
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character: Hemoglobin
topic: Transport of Gases in the Blood
grade: 10
subject: Biology
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character: Carbon Dioxide
topic: Gas Exchange in Respiration
grade: 10
subject: Biology
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character: Red Blood Cell
topic: Role in Gas Transport
grade: 10
subject: Biology
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