character: Hemoglobin
topic: Carrying Oxygen and Carbon Dioxide
grade: 11
subject: Biology
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character: Oxygen
topic: Role in Cellular Respiration
grade: 11
subject: Biology
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character: Carbon Dioxide
topic: Transport in Blood
grade: 11
subject: Biology
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character: Myoglobin
topic: Oxygen Storage in Muscles
grade: 11
subject: Biology
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