APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Involuntary muscles are the muscles that contract or move without conscious control. The autonomic nervous system controls involuntary muscle movement. These muscles are generally associated with the viscera or internal organs that exhibit regular, slow contractions and involuntary actions.

Detailed explanation-2: -Smooth muscle, found in the walls of the hollow internal organs such as blood vessels, the gastrointestinal tract, bladder, and uterus, is under control of the autonomic nervous system. Smooth muscle cannot be controlled consciously and thus acts involuntarily.

Detailed explanation-3: -The actions of involuntary muscles are mainly controlled by the autonomic nervous system in the body. These involuntary muscles include smooth muscles and cardiac muscles.

Detailed explanation-4: -Involuntary muscles are present in the walls of the digestive system, blood vessels, bronchi, uterus and bladder. Although they are formed by special striated muscle fibers that are not smooth, they still belong to the smooth muscle group, as well as the heart muscle group.