Your skeleton helps you leap, somersault, and touch your toes -- without it, you would be as floppy as a beanbag! There are over 200 bones living and growing inside you that make up your skeleton. There are also ligaments and joints that hold your bones together, and cartilage in your bendable parts like your ears and your nose. Learn all about what a skeleton can do -- because this isn't some make-believe Halloween skeleton, this is the real skeleton inside you.
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学英语入门书 给小朋友看的科普读物
评分学英语入门书 给小朋友看的科普读物
评分学英语入门书 给小朋友看的科普读物
评分学英语入门书 给小朋友看的科普读物
评分学英语入门书 给小朋友看的科普读物
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