Smooth Muscle Anatomy

Smooth muscle fibers are spindle shaped wide in the middle and tapered at both ends somewhat like a football and have a single nucleus. Smooth muscle tissue is also known as visceral muscle tissue.

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Smooth muscle contracts under certain stimuli as atp is freed for use by the myosin.

Smooth muscle anatomy. These cells have fibers of actin and myosin which run through the cell and are supported by a framework of other proteins. They are designed to contract simultaneously because of their organized muscle layers that are closely interconnected to each other. It is layered in a distinctive pattern of circular layers.

Although they do not have striations and sarcomeres smooth muscle fibers do have actin and myosin contractile proteins and thick and thin filaments. Smooth muscle also called involuntary muscle muscle that shows no cross stripes under microscopic magnification. This smooth muscle can be found surrounding the walls of the blood vessels the bronchioles in the lungs and the sphincter muscles used in the gi tract.

They are also non striated and have no organized myofilaments. Myofibroblasts produce connective tissue proteins such as collagen and elastin. Human anatomy autonomic nervous system smooth muscle.

Smooth muscle is composed of sheets or strands of smooth muscle cells. Smooth muscle cells can undergo hyperplasia mitotically dividing to produce new cells. Smooth muscle is found throughout the body around various organs and tracts.

The smooth muscle around these organs also can maintain a muscle tone when the organ empties and shrinks a feature that prevents flabbiness in the empty organ. Transport chyme through wavelike contractions of the intestinal tube. In general visceral smooth muscle produces slow steady contractions that allow substances such as food in the digestive tract to move through the body.

It consists of narrow spindle shaped cells with a single centrally located nucleus. They range from about 30 to 200 μm thousands of times shorter than skeletal muscle fibers and they produce their own connective tissue endomysium. Smooth muscle cells have a single nucleus and are spindle shaped.

Smooth muscle has different functions in the human body including. The smooth muscle cells are characterized by a single nucleus and a spindle shaped figure. It consists of narrow spindle shaped cells with a single centrally located nucleus.

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