character: Dr. Sarah Williams
topic: Functions of the Cardiovascular System
grade: 11
subject: Biology
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character: Mr. Jason Lee
topic: Overview of Heart Anatomy
grade: 11
subject: Biology
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character: Ms. Emily Chen
topic: Circulatory System Pathways
grade: 11
subject: Biology
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character: Dr. Robert Smith
topic: Blood Flow and Oxygen Transport
grade: 11
subject: Biology
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