character: Mr. Johnson
topic: Understanding Heart Valves: Structure and Function
grade: 10
subject: Science
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character: Ms. Smith
topic: Human Circulatory System Overview
grade: 10
subject: Science
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character: Dr. Lee
topic: The Role of Valves in Blood Flow Regulation
grade: 10
subject: Science
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character: Coach Brown
topic: Effects of Exercise on Heart Valve Function
grade: 10
subject: Science
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