Muscular system

Your muscular system helps you move and do things. Just like how you need your legs to run and jump, your muscles help you do these things!

Your muscles are like rubber bands, except they are much stronger. They are stretchy and can be shorten to make your body move. Imagine a time when you played with play-dough and squished and squeezed it between your fingers, to make different shapes. Muscles are like that only instead of squishing play-dough you squish muscle fibers together to get the muscle to do what you want it to.
You have hundreds of different muscles in your body. Some are big, like the muscles in your thighs or arms, and some are small, like the muscles in your fingers or eyes.

Your brain tells your muscles what to do, and your muscles listen. When you want to walk or run, your brain tells your leg muscles to move. When you want to pick something up, your brain tells your arm muscles to lift.
Your muscles can get bigger and stronger when you exercise them. That's why it is important to be active every day!

Overall, the muscular system is a important part of your body that helps you move and do things. Think of it like an army of rubber bands, that your brain tells what to do.