character: Dr. Sarah Johnson
topic: The Role of the Respiratory System in Human Health
grade: 9
subject: Biology
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character: Dr. Emily Carter
topic: Understanding the Human Respiratory System
grade: 9
subject: Biology
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character: Mr. John Lee
topic: Gas Exchange and Its Importance
grade: 9
subject: Biology
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character: Ms. Lisa Tran
topic: How Exercise Affects Lung Function
grade: 9
subject: Biology
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