character: Dr. Green
topic: The Role of Hemoglobin in Oxygen Transport
grade: 9
subject: Science
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character: Professor Smith
topic: Understanding Blood Components and Their Functions
grade: 9
subject: Science
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character: Ms. Johnson
topic: The Respiratory System and Gas Exchange
grade: 9
subject: Science
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character: Mr. Lee
topic: How the Circulatory System Works with the Respiratory System
grade: 9
subject: Science
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