Answer :

Smooth muscles are the type of muscle that contracts and relax to control the movement of the contents.

What are Smooth muscles?

Smooth muscle is an involuntary, non-striated muscle since it lacks sarcomeres and striations (bands or stripes). Single-unit smooth muscle and multi-unit smooth muscle are its two subgroups. A syncytium is the collective contraction of the sheet or bundle of smooth muscle cells that make up a single-unit muscle.

Smooth muscle makes up the walls of hollow organs including the stomach, intestines, bladder, and uterus as well as the blood and lymphatic vessels, as well as the tracts of the respiratory, urinary, and reproductive systems. The ciliary muscle, a type of smooth muscle present in the eyes, changes the shape of the lens by dilation and contraction of the iris.

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