character: Hemoglobin
topic: Function of Hemoglobin in Gas Transport
grade: 9
subject: Science
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character: Oxygen
topic: Role of Oxygen in the Body
grade: 9
subject: Science
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character: Carbon Dioxide
topic: Transport of Carbon Dioxide in Blood
grade: 9
subject: Science
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character: Red Blood Cells
topic: Structure and Function of Red Blood Cells
grade: 9
subject: Science
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