Q:

What is the structure and function of the muscular system?

A:

Quick Answer

InnerBody explains that the human body contains three muscle types, which each perform a different function. The most obvious muscles are the skeletal muscles, which attach to tendons and move voluntarily, according to the Cleveland Clinic. Skeletal muscles produce body movements and maintain posture, allowing humans to sit, stand and walk. The Cleveland Clinic describes smooth muscles as those that line some of the body’s organs, and cardiac muscle as those that control the heart.

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Full Answer

In contrast to skeletal muscles, which are under voluntary control, cardiac and smooth muscles move involuntarily. Smooth muscles line the walls of many internal organs, such as the stomach and intestines, according to InnerBody. The smooth muscles, which are also called visceral muscles, help to pass food through the digestive system and other similar functions.

The University of California, Clermont, explains that the diaphragm is a smooth muscle that is at least partially under conscious control. While humans do not have to think to breathe, the diaphragm can be controlled, such as when people hold their breath.

All three types of muscles vary in appearance. Skeletal and cardiac muscles both possess striations when viewed microscopically. InnerBody states that these striations indicate that the muscles are strong. By contrast, smooth muscles lack such striations and are comparatively weak.

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Related Questions

  • Q:

    What are some muscular system facts for kids?

    A:

    The muscular system consists of 650 muscles and it supports the movements required to walk, talk, eat and stand. It makes up more than 40 percent of the body’s total weight. The muscular system controls daily functions, maintains posture and circulates blood. It is divided into three types of muscles: skeletal muscles, smooth muscles and cardiac muscles.

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  • Q:

    How does the muscular system maintain homeostasis?

    A:

    The muscular system contributes to maintaining homeostasis by working with other body systems to regulate body temperature and dilate or constrict blood vessels close to the skin's surface, according to OpenCurriculum. The muscular, nervous, cardiovascular, endocrine and integumentary systems work together to cause sweating and shivering in the body, which contribute to homeostasis.

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  • Q:

    What are fun facts about the muscular system?

    A:

    The muscular system consists of approximately 700 muscles that belong to one of three distinct categories: skeletal, smooth or cardiac. Skeletal muscles are attached to the body's skeleton and assist it in moving. Smooth muscles are found in the internal organs and help maintain normal functions such as bladder control. Cardiac muscle is only found in the heart.

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  • Q:

    What are the main functions of the muscular system?

    A:

    The two major functions of the muscular system are the ability to make the body move and the posture of the body. The muscles enable the arms, legs and other parts of the body to move while keeping the body in an upright or sitting position without falling over.

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