Describing the Muscular System. Specific Exercises for each muscle group.

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Muscular System

The muscular system works with the skeletal system to produce movement of the body. The nervous system also works in conjunction with the muscular system to initiate movement in the muscles.

The muscular system can be divided into 3 parts: smooth, cardiac and skeletal.

Smooth muscle

This type pf muscle is also known as involuntary muscle as we do not control the movement of them consciously.  

Examples of smooth muscle can be found in, the digestive system, circulatory system and urinary system.

Multi-unit smooth muscle is composed of cells that can operate independently of one another. Visceral smooth muscle, on the other hand (often called single-unit smooth muscle), is composed of cells that, collectively, function together as a single unit. Some examples of multi-unit smooth muscle found in the body are the muscle in the iris of the eye (which causes the iris to either dilate or constrict), the muscles that cause erection of the hairs when stimulated by the nervous system (for instance, when you are so scared that your hair stands on end), and the muscle of the larger blood vessels (that help to either dilate or constrict certain sections of the blood vessels).

Visceral smooth muscle is found in the walls of most of the hollow organs of the body, especially in the walls of the gut, the intestines, the ureters, the bladder, and the uterus. As you can well imagine, then, each smooth muscle group has a very specialized function distinct from the others: in the uterus it must work to help a woman deliver her baby; in the bladder it must work to help push urine into the urethra, which also contains smooth muscle, to squeeze urine out of the body.

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Cardiac Muscle

Cardiac muscle is fundamentally an involuntary muscle and is located in the walls of the heart.

The cardiac muscle functions with the help of its cardiac cells. These cells are responsible for the contraction of this muscle and sending blood to the atria and ventricles. That in turn, reaches the blood vessels of the circulatory system. The cardiac muscle is not linear, unlike the striated or smooth muscles. It forms instead, a complicated and crisscross network of muscle fibres, in any direction possible.

The fibres of the heart will contract involuntarily around 60 ...

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