character: Ruby the Red Blood Cell
topic: The Journey of Red Blood Cells in the Body
grade: 6
subject: Health Education
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character: The Heart
topic: How Blood Circulates in the Body
grade: 6
subject: Health Education
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character: Oxygen Molecules
topic: Role of Oxygen in Blood Circulation
grade: 6
subject: Health Education
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character: White Blood Cells
topic: Comparison between Red and White Blood Cells
grade: 6
subject: Health Education
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