The muscular system
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The Muscular System. By Daniel Manalo and Angel Cabral. Muscle Structure. Muscle Structure. Muscles contain connective tissues which holds muscle cells together and provides elasticity Muscle tissue also contains large amounts of contractile filaments.

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The muscular system

The Muscular System

By Daniel Manalo and Angel Cabral



Muscle Structure

  • Muscles contain connective tissues which holds muscle cells together and provides elasticity

  • Muscle tissue also contains large amounts of contractile filaments.

  • These protein filaments are called actin and myosin

  • Actin and myosin enables muscles to contract

  • Other characteristics of muscle tissue include the ability to stretch or expand and also the ability to respond to stimuli



Function

  • Skeletal Muscles

  • The primary function of skeletal muscles are to produce voluntary gross and fine movement

  • Skeletal muscles also protect organs

  • The abdominal muscles and the muscles of your lower back helps to protect your vital organs


Function

Skeletal Muscles


  • Cardiac muscle

  • Cardiac muscles pumps blood

  • The contraction of the heart is involuntary and primarily controlled by your heart’s electrical system


  • Smooth muscle

  • Smooth muscles are the muscles you have in your stomach and intestine

  • They work to process the food you eat

  • Smooth muscles in the walls of your blood vessels ensure blood flow


Disease

  • Distal Muscular Dystrophy

  • Symptoms: weakness and wasting of muscle of the hands, forearms, and lower legs

  • Distal muscular Dystrophy is caused by defects genes

  • typical onset age is 20 to 60 years old.

  • No known cure


Sources

Wikipedia. Wikimedia Foundation. Web. 29 Apr. 2012. <http://www.wikipedia.org/>.

"Five Functions of the Muscular System." LIVESTRONG.COM. Web. 29 Apr. 2012.

Johnson, George B., and Peter H. Raven. Holt Biology. Orlando: Holt, Rinehart and Winston, 2006. Print.


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