muscular system. terminology (pg. 167) myo-fasciculus sarco-platys iso-tonos syn--trophy...
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Muscular Muscular SystemSystem
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Terminology (pg. 167)Terminology (pg. 167)
myo- fasciculus
sarco- platys
iso- tonos
syn- -trophy
tetanos caput
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IntroductionIntroduction• Over 600 muscles
• Lots of mitochondria and blood vessels
• 45% of body weight is muscles
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FunctionsFunctions1. Locomotion: move skeleton
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2. Posture: some muscles are always partially contracted
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3. Maintain body temperature by producing heat
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4.Respiration and circulation
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5. Guarding entrances
and exits (sphincters)
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• 6.Movement along internal passageways (peristalsis)
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7.Communication (verbal and body language)
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CharacteristicsCharacteristics
• 1. Excitability-ability to respond
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2.Contractibility-ability to shorten
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• 3.Extensibility-ability to stretch
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• 4.Elasticity-ability to return to previous length
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Types-SkeletalTypes-Skeletal
striated-appear lined
voluntary
lots of nuclei in the cell
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SmoothSmooth
• Non-striated
• Involuntary
• Spindle shaped
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CardiacCardiac
• Striated
• Involuntary
• Branched intercolated disks
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