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What makes muscles contract? A physiologist explains how muscles move

By Kiki Crawford, Lecturer of Biological Sciences, USC Dornsife College of Letters, Arts and Sciences

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com.

What makes the cells of the muscles contract? – Samarth, age 13, India

Muscles are amazing. They’re what let you strum a guitar, kick a soccer ball and high-five your friends. When you decide to move, your…

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