Difference between Voluntary and Involuntary Muscles

what is the difference between voluntary and involuntaryThe musculoskeletal system is mainly concerned with body movement, maintenance of body posture and circulation of red blood cells throughout the body.

These muscles are connected to bones, tendons and other internal organs in our body, mainly composed of skeletal muscles, organs, tendons and nerves.

All movement in our body is caused by the contraction of muscles and is found in every part of the body including blood vessels, heart and digestive organs Muscles in these parts work by moving materials throughout the body. There are three types of muscles and they are classified mainly according to their structure of movement.

What is Voluntary Muscles?

Voluntary muscles are long multi-stranded cells with sarcomeres arranged in groups. These muscles consist of cylindrical fibers and are usually attached to bone and skin.

They play an important role in movement of the body during contraction and relaxation and their actions are mostly under the control of the somatosensory nervous system These voluntary muscles include skeletal muscles.

What is Involuntary Muscles?

The involuntary muscles are striated and branch into the heart muscle. Actions in the involuntary muscles are primarily controlled by the autonomic nervous system in the body. These involuntary muscles include smooth muscles and cardiac muscles.

Difference between Voluntary and Involuntary Muscles

Voluntary Muscles

Involuntary Muscles

Cylindrical, long, and unbranched shaped muscles. Spindle-shaped, small muscles.
These muscles are multinucleated. These muscles are uni nucleated.
Found attached to bones. Found in the walls of internal organs.
High energy requirement. Low energy requirement.
Presence of the nucleus at the periphery. Presence of the nucleus at the center.
Has a thick Sarcolemma Has a thin Sarcolemma
Actions are mainly regulated by somatic nervous system. Actions are mainly regulated by Autonomic nervous system.
 Rapid and powerful contractions. Slow and rhythmic contractions.
High energy required Low energy energy required
Get fatigued needing rest regularly. Not fatigued, can work continuously.
These muscles are under the control of our will. These muscles not governed by our will.
Involved in the movement of body parts and the locomotion of the body. Involved in the internal movements of the organs, aiding the passage of fluids and food in the digestive system.
Diaphragm, pharynx, abdominal wall tongue, muscles of middle ear, muscles underneath the skin are few examples of Voluntary Muscles Blood vessels, Alimentary tracts, ducts of glands, Urogenital tracts, respiratory tracts,  are few examples of Involuntary Muscles


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