Final answer:
Visceral smooth muscle is found in the walls of visceral organs and contracts as a single unit. It has a stress-relaxation response and produces slow, steady contractions for the movement of substances.
Step-by-step explanation:
Visceral smooth muscle, also known as single-unit smooth muscle, is found in the walls of visceral organs except the heart. It is characterized by its ability to contract as a single unit due to the presence of gap junctions between muscle fibers. Visceral smooth muscle also exhibits a stress-relaxation response, allowing the organs to stretch and contract without emptying their contents prematurely. This type of smooth muscle produces slow, steady contractions that aid in the movement of substances, such as food, through the body