character: Mr. Robert Lee
topic: Blood Flow and Gases Exchange
grade: 10
subject: Biology
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character: Dr. Jane Smith
topic: Circulatory System Functions
grade: 10
subject: Biology
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character: Ms. Emily Brown
topic: Respiratory System Overview
grade: 10
subject: Biology
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character: Mr. Tom Johnson
topic: Hemoglobin and Oxygen Transport
grade: 10
subject: Biology
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