Muscle tissues also play a pivotal role in the digestion of food. There are three types of muscle tissues: smooth, skeletal, and cardiac. Functions Smooth muscles are involuntary muscles that are found almost all over the body, such as in the stomach, the digestive system, eyes, and blood vessels. Skeletal muscles are voluntary muscles that make up the musculoskeletal system of the human body. Cardiac muscles are found only in the heart. They contract to push out blood from the heart, and they relax to allow blood to enter the heart.
Watch a video about how neurons work.
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