character: Dr. Emily Carter
topic: Understanding the Human Respiratory System
grade: 9
subject: Biology
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character: Mr. John Smith
topic: Overview of the Respiratory System Structures
grade: 9
subject: Biology
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character: Ms. Sarah Johnson
topic: Gas Exchange in the Lungs
grade: 9
subject: Biology
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character: Dr. Alex Bennett
topic: Common Respiratory Diseases and Their Impacts
grade: 9
subject: Biology
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