DID YOU KNOW ?
Fun facts about Muscles for kids• Shivering is caused by hundreds of muscles contracting and relaxing to produce heat and make us warmer.
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DID YOU KNOW ?
Fun facts about Muscles for kids• Shivering is caused by hundreds of muscles contracting and relaxing to produce heat and make us warmer.
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Human Body Book | Introduction to the Muscular System | Children's Anatomy & Physiology Edition
byBaby Professor