Smooth Muscle Definition Anatomy

Smooth muscle also called involuntary muscle muscle that shows no cross stripes under microscopic magnification. Describe the differences between single unit smooth muscle and multiunit smooth muscle.

Vascular Smooth Muscle Wikipedia

Muscle tissue that contracts without conscious control having the form of thin layers or sheets made up of spindle shaped unstriated cells with single nuclei and found in the walls of the internal organs such as the stomach intestine bladder and blood vessels excluding the heart.

Smooth muscle definition anatomy. Smooth muscle is a type of tissue found in the walls of hollow organs such as the intestines uterus and stomachyou can also find smooth muscle in the walls of passageways including arteries and veins of de cardiovascular systemthis type of involuntary non striated muscle is also found in the tracts of the urinary respiratory and reproductive systems. Smooth muscle tissue unlike striated muscle contracts slowly and automatically. Medical definition of smooth muscle.

Muscle tissue that contracts without conscious control having the form of thin layers or sheets made up of spindle shaped unstriated cells with single nuclei and found in the walls of the internal organs such as the stomach intestine bladder and blood vessels excluding the heart. Both the skeletal muscles and the cardiac muscles have striations when viewed under the microscope. There are three types of muscles.

It consists of narrow spindle shaped cells with a single centrally located nucleus. Smooth muscle generally forms the supporting tissue of blood vessels and hollow internal organs such as the stomach intestine and bladder. Skeletal muscles smooth muscles and the cardiac muscles.

Smooth muscle so named because the cells do not have striations is present in the walls of hollow organs like the urinary bladder uterus stomach intestines and in the walls of passageways such as the arteries and veins of the circulatory system and the tracts of the respiratory urinary and reproductive systems figure 1ab. Smooth muscles can contract over a wider range of resting lengths because the actin and myosin filaments in smooth muscle are not as rigidly organized as those in skeletal and cardiac muscle. The muscular system encompasses all the muscles of the animal body.

In contrast the smooth muscle lacks striations. Smooth muscle is composed of sheets or strands of smooth muscle cells. Muscle tissue that contracts without voluntary control having fine myofibrils but lacking transverse striations and found in the walls of internal organs blood vessels and hair follicles.

It is considered smooth because it does not have the microscopic lines the striations seen in the other two types of muscle. Smooth muscle definition smooth muscle is a type of muscle tissue which is used by various systems to apply pressure to vessels and organs.

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