If you didn't have muscles you wouldn't be able to move any part of your body because your muscles are attached to your bones and that lets you move. There are more than 600 muscles in your body. You control some of your muscles and some of them are like your heart which just do there job on their own without you reminding them to. All muscles are made out of a type of tissue. You have three different types of muscles in your body. They are smooth muscles, cardiac muscles and skeleton muscles. You can't control smooth muscles you brain tell the muscle what to do. the smooth muscles are working all around your body and you don't even notice. Smooth muscles are also in your bladder. They allow you to hold urine (pee) until you go to the bathroom. So now you know that muscles are an important part of your body!
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