character: Dr. Smith
topic: Gas Exchange Mechanisms
grade: 11
subject: Biology
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character: Mr. Johnson
topic: Respiratory System Functionality
grade: 11
subject: Biology
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character: Ms. Lee
topic: Oxygen Transport in Blood
grade: 11
subject: Biology
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character: Dr. Patel
topic: Diffusion and the Alveoli
grade: 11
subject: Biology
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