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Muscular System

Muscular System. Terminology (pg. 167). myo- fasciculus sarco- platys iso- tonos syn- -trophy tetanos caput. Introduction. Over 600 muscles Lots of mitochondria and blood vessels 45% of body weight is muscles. Functions. Locomotion: move skeleton.

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Muscular System

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  1. Muscular System

  2. Terminology (pg. 167) myo- fasciculus sarco- platys iso- tonos syn- -trophy tetanos caput

  3. Introduction • Over 600 muscles • Lots of mitochondria and blood vessels • 45% of body weight is muscles

  4. Functions • Locomotion: move skeleton

  5. 2. Posture: some muscles are always partially contracted

  6. 3. Maintain body temperature by producing heat

  7. 4.Respiration and circulation

  8. Guarding entrances and exits (sphincters)

  9. 6.Movement along internal passageways (peristalsis)

  10. 7.Communication (verbal and body language)

  11. 1. Excitability-ability to respond Characteristics

  12. 2.Contractibility-ability to shorten

  13. 3.Extensibility-ability to stretch

  14. 4.Elasticity-ability to return to previous length

  15. Types-Skeletal striated-appear lined voluntary lots of nuclei in the cell

  16. Smooth • Non-striated • Involuntary • Spindle shaped

  17. Cardiac • Striated • Involuntary • Branched intercolated disks

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