What do voluntary muscles do

Smooth Muscle: All smooth muscle is involuntary muscle. Its action is not controlled by our thoughts. Smooth muscle makes up tissues that are vital for continuous, everyday life.

In the digestive system, it is found in the stomach walls to mechanically digest our food and in the intestine it passes the food along by wave-like contractions peristalsis. In the circulatory system, the smooth muscle of the artery walls maintains the blood pressure and helps regulate flow.

In the iris of the eye smooth muscle regulates the opening of the pupil. Thankfully all these actions are involuntary. Imagine having to think about all these things all the time!

By applying the above classifications it is possible to describe three forms of muscle tissue which perform the wide range of functions described. Skeletal muscle mainly attaches to the skeletal system via tendons to maintain posture and control movement for example contraction of the biceps muscle, attached to the scapula and radius, will raise the forearm. Some skeletal muscle can attach directly to other muscles or the skin, as seen in the face where numerous muscles control facial expression.

Skeletal muscle is under voluntary control, although this can be subconscious for example when maintaining posture or balance. Morphologically skeletal myocytes are elongated and tubular and appear striated with multiple peripheral nuclei. Cardiac muscle tissue is found only in the heart where cardiac contractions pump blood throughout the body and maintain blood pressure.

As with skeletal muscle cardiac muscle is striated, however it is not consciously controlled and so is involuntary. Cardiac muscle can be further differentiated from skeletal muscle by the presence of intercalated discs which control the synchronized contraction of cardiac tissues. Python Pillow. Python Turtle. Verbal Ability. Interview Questions. Company Questions. Artificial Intelligence. Cloud Computing. Data Science.

Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design. What are some examples of skeletal muscle?

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