ANATOMY

Detailed explanation-1: -At a cellular level, smooth muscle functions as an involuntary non-striated muscle. Smooth muscle contains thick and thin filaments that do not arrange into sarcomeres, resulting in a non-striated pattern.

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: -Any muscle which is invountary is called so because you cannot control the movement of those muscles. Thesemuscles line internal organs, blood vessels, and organs such found in the digestive and reproductive systems.

Detailed explanation-4: -Smooth muscle is also called visceral, non-striated, non-striped or involuntary muscle. Skeletal muscle is called striped muscle or striated muscle or voluntary muscle. Smooth muscles are found in the internal i.e. visceral organs and hence they are called visceral muscles. They are involuntary.

Detailed explanation-5: -Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary.