the cardiac muscle : the heart is made up of the cardiac muscle. These muscles are thick and contract in order to pump out the blood and then relax in order to allow more blood in. The cardiac muscle is an involuntary muscle, or the type that works without your volition. Special type of cells in the cardiac muscle, called the pacemaker, help in controlling the heartbeat The smooth muscles : these are the involuntary muscles of the human muscular system, and they generally occur in layers or sheets, with one muscle layer behind another. These muscles are not under your control. The brain and the body control these muscles in performing their functions without any conscious volition from your part
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