The heart and blood
12 min read
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About This Book
Grade level: Discusses how the heart and circulatory system work, the functions of blood, how doctors help people with blood and heart disorders, and how to keep the cardiovascular system healthy through diet and exercise.
Grade level: 3, 4, 5, 6, 7, p, e, i.
Grade level: 3, 4, 5, 6, 7, p, e, i.
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