character: Arterial Alice
topic: The Structure of Blood Vessels
grade: 10
subject: Biology
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character: Vein Vitaly
topic: Differences Between Arteries and Veins
grade: 10
subject: Biology
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character: Capillary Clara
topic: The Role of Capillaries in Circulation
grade: 10
subject: Biology
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character: Heart Henry
topic: The Cardiovascular System Overview
grade: 10
subject: Biology
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