character: Anatomy Annie
topic: Heart Anatomy and Function
grade: 10
subject: Biology
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character: Circulatory System Sam
topic: Heart Structure Overview
grade: 10
subject: Biology
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character: Cardio Clara
topic: Blood Flow Pathway in the Heart
grade: 10
subject: Biology
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character: Vascular Victor
topic: The Role of Valves in Heart Function
grade: 10
subject: Biology
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