A person uses 17 muscles when they smile, and 43 when they frown.
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Human Body Facts
Non-FictionHave you ever wanted to know more about the Human Body? Have you ever wondered how much blood your heat pumps or wondered what's more sensitive than your fingers? This will take you on an adventure through the Human body in which you've never expect...
Smile More
A person uses 17 muscles when they smile, and 43 when they frown.
