character: Mr. John Smith
topic: The Role of Platelets in Hemostasis
grade: 10
subject: Biology
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character: Dr. Emily Brown
topic: Blood Clotting Mechanisms
grade: 10
subject: Biology
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character: Ms. Sarah Johnson
topic: Overview of the Circulatory System
grade: 10
subject: Biology
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character: Mr. David Wilson
topic: Introduction to the Immune System
grade: 10
subject: Biology
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