Book Creator

Muscular System

by Morgan Ridens

Cover

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Muscular System
Comic Panel 1
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August 2021
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story
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MAIN
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Enjoy!
What's
INSIDE
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34
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01. Skeletal
Muscles that work with your bones, tendons, and ligaments.





02. Cardiac
Line the heart walls.









03. Smooth
Line the insides of organs.








































































GODS
Functions of the muscular system
The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.

The integrated action of joints, bones and skeletal muscles produces obvious movements such as walking and running. Skeletal muscles also make more subtle movements resulting in facial expressions, eye  movements, and respiration.

In addition to movement, muscle contraction also fulfills some other essential functions in the body, such as posture, joint stability, and heat production. Posture, such as sitting and standing, is maintained as a result of muscle contraction. The skeletal muscles continually make fine adjustments that hold the body in stationary positions. The tendons of many muscles extend over joints and in this way contribute to joint stability. This is particularly evident in the knee and shoulder joints, where muscle tendons are a major factor in stabilizing the joint. Heat production, to maintain body temperature, is an essential by-product of muscle metabolism.
Threats to the muscular System
Rhabdomyolysis (often called rhabdo) is a serious medical condition that can be fatal or result in permanent disability.  It results from the death of muscle fibers and the release of their contents into the bloodstream. This dangerous muscle damage can result from overexertion, trauma, toxic substances, or disease. As muscle cells disintegrate, they release a protein called myoglobin into the blood. These substances can damage the heart and kidneys and cause permanent disability or even death.

Polymyositis is one of a group of muscle diseases known as inflammatory myopathies, which are characterized by chronic muscle inflammation accompanied by muscle weakness. Polymyositis affects skeletal muscles on both sides of the body.  The muscles eventually start to break down and become weak. The condition can affect muscles all over the body. This can make even simple movements difficult.


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