character: Hemoglobin
topic: Function of Hemoglobin in the Body
grade: 6
subject: Health Education
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character: Red Blood Cells
topic: Oxygen Transport in the Blood
grade: 6
subject: Health Education
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character: Lungs
topic: Oxygen Exchange in the Respiratory System
grade: 6
subject: Health Education
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character: Body Cells
topic: Usage of Oxygen by Cells for Energy
grade: 6
subject: Health Education
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