character: Mr. Oxygen Transporter
topic: How Oxygen is Transported in the Blood
grade: 10
subject: Biology
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character: Dr. Hemoglobin
topic: Role of Hemoglobin in Oxygen Binding
grade: 10
subject: Biology
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character: The Red Blood Cell
topic: Structure and Function of Red Blood Cells
grade: 10
subject: Biology
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character: Professor Gas Exchange
topic: Gas Exchange in the Lungs and Tissues
grade: 10
subject: Biology
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