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While you are awake... while you are asleep... your heart is always beating—but just how does your heart work?
This book introduces human anatomy with a clear, accessible look at the circulatory system.
Did you know that a baby's heart beats more than 120 times a minute, while a mouse's heart beats more than 500 times a minute, or that you can only feel your pulse in an artery and not a vein?
Includes activities and resources. By Paul Showers. Illustrated by Holly Keller. Paperback, 33 pages. Ages 5 - 9.
