Final answer:
Smooth muscle is found in hollow organs, lacks striations, and is under involuntary control. It has a single nucleus per cell and is essential for moving internal substances and managing organ volume.
Step-by-step explanation:
Characteristics of Smooth Muscle
Smooth muscle is a unique type of muscle tissue with several key characteristics. First, smooth muscle is found in the walls of hollow organs such as the intestines, stomach, and urinary bladder, as well as in passageways like blood vessels and the respiratory tract. Second, unlike skeletal muscle, smooth muscle does not have striations and is therefore referred to as non-striated muscle. Third, smooth muscle is under involuntary control, meaning it is not consciously controlled by individuals. This type of muscle is controlled by the autonomic nervous system. Each cell in smooth muscle contains a single nucleus and is spindle-shaped, contributing to the overall functionality of moving internal organs and regulating the flow of substances within the body.