character: Ms. Emily Johnson
topic: Calcium Regulation and Bone Density
grade: 11
subject: Biology
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character: Dr. Robert Smith
topic: Osteoporosis and Calcium Metabolism
grade: 11
subject: Biology
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character: Ms. Sarah Lee
topic: Vitamin D's Role in Bone Health
grade: 11
subject: Biology
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character: Mr. John White
topic: Bone Remodeling and Its Impact on Density
grade: 11
subject: Biology
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