What does smooth muscle mean?

Definitions for smooth muscle
smooth mus·cle

This dictionary definitions page includes all the possible meanings, example usage and translations of the word smooth muscle.

Princeton's WordNet

  1. smooth muscle, involuntary musclenoun

    a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart)

  2. smooth musclenoun

    muscle tissue that does not appear striated under the microscope; has the form of thin layers or sheets


  1. smooth musclenoun

    Involuntary muscle which is found within the intestines, throat, uterus, and blood vessel walls.


  1. Smooth muscle

    Smooth muscle is an involuntary non-striated muscle, so-called because it has no sarcomeres and therefore no striations (bands or stripes). It is divided into two subgroups, single-unit and multiunit smooth muscle. Within single-unit muscle, the whole bundle or sheet of smooth muscle cells contracts as a syncytium. Smooth muscle is found in the walls of hollow organs, including the stomach, intestines, bladder and uterus; in the walls of passageways, such as blood, and lymph vessels, and in the tracts of the respiratory, urinary, and reproductive systems. In the eyes, the ciliary muscles, a type of smooth muscle, dilate and contract the iris and alter the shape of the lens. In the skin, smooth muscle cells such as those of the arrector pili cause hair to stand erect in response to cold temperature or fear.


  1. smooth muscle

    Smooth muscle refers to a type of involuntary non-striated muscle that makes up the walls of organs and structures like the esophagus, stomach, intestines, bronchi, uterus, urethra, and blood vessels. Unlike the skeletal muscles, smooth muscles are not under conscious control. Instead, they are directly controlled by autonomic nerves. They help in various processes like peristalsis, blood flow control, and maintaining organ size.

Editors Contribution

  1. smooth muscle

    Is a type of muscle with a specific function and structure according to its location within the body.

    Smooth muscle is found within the walls of blood vessels, the aorta, small arteries, arterioles and veins. Smooth muscle is also found in lymphatic vessels, the urinary bladder, uterus (termed uterine smooth muscle), male and female reproductive tracts, gastrointestinal tract, respiratory tract, arrector pili of skin, the ciliary muscle, and iris of the eye.

    Submitted by MaryC on January 9, 2016  

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  1. Chaldean Numerology

    The numerical value of smooth muscle in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of smooth muscle in Pythagorean Numerology is: 1

Translations for smooth muscle

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"smooth muscle." Definitions.net. STANDS4 LLC, 2024. Web. 21 May 2024. <https://www.definitions.net/definition/smooth+muscle>.

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