GENERAL HISTOLOGY

Detailed explanation-1: -Smooth muscle fibers are located in walls of hollow visceral organs (such as the liver, pancreas, and intestines), except the heart, appear spindle-shaped, and are also under involuntary control.

Detailed explanation-2: -The smooth muscle is found in the walls of many hollow organs such as stomach, intestines, urinary bladder, and in the walls of passageways, like the veins and arteries of the circulatory system, and the tracts of the urinary, respiratory and reproductive system. It is an involuntary non-striated muscle.

Detailed explanation-3: -At a cellular level, smooth muscle can be described as an involuntary, non-striated muscle. Smooth muscle consists of thick and thin filaments that are not arranged into sarcomeres giving it a non-striated pattern. On microscopic examination, it will appear homogenous.