character: Mr. Johnson
topic: Benefits of Exercise on Heart Health
grade: 11
subject: Science
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character: Dr. Smith
topic: Cardiovascular Effects of Regular Physical Activity
grade: 11
subject: Science
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character: Coach Davis
topic: How Exercise Strengthens the Heart Muscles
grade: 11
subject: Science
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character: Nurse Linda
topic: Understanding Heart Health and Fitness
grade: 11
subject: Science
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