character: Dr. Sarah Johnson
topic: Physiology of the Heart and Circulatory System
grade: 11
subject: Biology
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character: Mr. James Carter
topic: Blood Types and Transfusions
grade: 11
subject: Biology
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character: Ms. Emily Roberts
topic: The Structure of Arteries and Veins
grade: 11
subject: Biology
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character: Dr. Michael Thompson
topic: Cardiovascular Diseases
grade: 11
subject: Biology
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