Smooth muscle. The muscles work automatically. To make the work of the body is normal. These muscles, like the muscles of the intestines sphincter of the anus. Muscles of the stomach and so on.
Smooth muscle is the muscle work automatically to make the work of the body to be normal. This type of muscle, like the muscles of the bowel muscle of anus hurut . The muscles of the stomach, etc.
A simple muscle muscle at work automatically to make the draft of the work of this type of muscle is normal such as muscles of the colon rectum sphincter muscle of the stomach, etc.