Draw neat and labelled diagram of smooth muscle?

Muscular system is an organ system, Body performs all the kind of movements with the help of muscular system. Almost all the animals have muscles. The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles are attached to bones or internal organs and blood vessels. There are more than 600 muscles present in a human body.

There are three types of muscles in a vertebrate body. They are

Smooth muscles are structurally the simplest of all muscles types. They are non-striated, and consist of long spindle shaped uni-nucleated muscle cells that are usually arranged in sheets that surround the body's hollow organs. Smooth muscles are also involuntary in action. Smooth muscles push the food through the digestive tract, they empty your urinary bladder, they control the diameter of the blood vessels, the diameter of your eye, the state of erection of hair of the skin, and the smooth muscles form the layer of sheet  around all the visceral organs.

Non-striated muscles, this means that muscles do not have transverse light and dark bands. The striations are caused by the regular arrangement of contractile proteins (actin and myosin). Actin is a globular contractile protein that interacts with myosin for muscle contraction. This means that non-striated muscles can not contract, thus they can not move.

Uni-nucleated Muscles, Smooth muscles are the only muscles which have cells with only one nuclei.

Involuntary in action, This means that their contraction is not under the control of somatic nervous system. The involuntary muscles are automatically controlled by the autonomic nervous system controls the activities of the inner visceral organs (heart, glands, smooth muscles), while the somatic nervous system controls all the voluntary actions.

Visceral Organs, word Visceral arises from latin word Viscera which means "the organ of the body", So Visceral organs are all the internal organs of the body, specifically those within the chest and abdomen. They are covered with visceral membrane made of smooth muscles.

I have attached two pictures of the smooth muscles, one is colored and the other one is colored and the other one is diagrammatic.

cardiovascular system

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