The Circulatory Story by Mary K. Corcoran

The Circulatory Story

Mary K. Corcoran with Jef Czekaj (Illustrator)

41 pages missing pub info (editions)

nonfiction childrens nature science
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Your hardworking heart started beating eight months before you were born and continues to beat about one hundred thousand times a day. "By the time you're seventy years old, it will have beaten about 2.5 billion times." Find out the story behind e...

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