Muscles
description
Transcript of Muscles
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Muscles
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Functions of the muscular system
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Functions of the muscular system
• Stabilize joints with their TENDONS
• Produce movement (including standing upright)
• Produce heat to maintain body temperature
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MUSCLE FACTS
• There are more than 600 muscles in your body
• Muscles are made of fibers that run parallel to each other held together in bundles by connective tissue
• Each fiber is a cylinder shaped cell
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Types of muscle tissue
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SKELETAL MUSCLE
• Attaches to bone for movement
• Striated: banded
• Voluntary: you control them
• Can fatigue (tire out)
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http://www.bmb.psu.edu/courses/bisci004a/tissues/skeletal.jpg
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CARDIAC MUSCLE
• Found only in the heart
• Make your heart beat• Striated• Involuntary: you can’t
control it• Does not fatigue (tire
out)
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http://www.sc.edu/union/Sears/AnimalTissue/im.tissueCardiac.jpg
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SMOOTH MUSCLE
• Unstriated• Involuntary• React slowly and tires
slowly• Controls breathing,
digestive movements, and blood pressure
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http://www.bmb.psu.edu
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MUSCLE ACTION
• Muscles always work in pairs– While one contracts, the other is relaxed
• Muscle fibers all have the same strength, so why are some people stronger than others?– They have more muscle fibers
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http://www.cytochemistry.net/microanatomy/muscle/smooth1.jpg
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http://www.sirinet.net/~jgjohnso/muscle.html