character: Dr. Emily Hartman
topic: Heart Physiology: Cardiac Muscle and Electrical Conduction
grade: 11
subject: Science
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character: Mr. Alex Thompson
topic: Understanding the ECG: Electrical Activity of the Heart
grade: 11
subject: Science
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character: Ms. Sarah Chen
topic: The Role of Pacemaker Cells in Heart Function
grade: 11
subject: Science
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character: Dr. Michael Rogers
topic: How Heart Muscles Contract in Response to Nerve Signals
grade: 11
subject: Science
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