character: Mr. David Johnson
topic: Oxygen and Carbon Dioxide Transport in the Body
grade: 10
subject: Biology
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character: Dr. Emily Carter
topic: Respiratory System Functions
grade: 10
subject: Biology
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character: Ms. Sarah Lee
topic: Hemoglobin and Oxygen Binding
grade: 10
subject: Biology
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character: Mr. John Smith
topic: Gas Exchange in the Lungs
grade: 10
subject: Biology
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