character: Dr. Hemoglobin
topic: Function of Hemoglobin in Oxygen Transport
grade: 9
subject: Science
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character: Dr. Oxygen
topic: Role of Oxygen in Cellular Respiration
grade: 9
subject: Science
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character: Dr. Blood
topic: Components of Blood and Their Functions
grade: 9
subject: Science
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character: Dr. Iron
topic: Importance of Iron in Hemoglobin Formation
grade: 9
subject: Science
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