How is smooth muscle contraction similar to skeletal muscle contraction?

Your body is composed of three types of muscle: skeletal muscle, smooth muscle, and cardiac muscle. Skeletal muscle makes up 40 percent of your total body weight, and smooth muscle and cardiac muscle each make up 5 percent of total body weight. Your muscles must contract in order to facilitate vital bodily functions. Skeletal and smooth muscles are located in different areas in your body to serve their distinct purposes.

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