character: Dr. John Smith
topic: Oxygen Transport in Blood
grade: 9
subject: Science
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character: Hemoglobin
topic: Role of Hemoglobin in Oxygen Transport
grade: 9
subject: Science
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character: Red Blood Cells
topic: Function of Red Blood Cells in Transporting Oxygen
grade: 9
subject: Science
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character: Capillaries
topic: Gas Exchange in Capillaries and Oxygen Delivery
grade: 9
subject: Science
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