Section 38: Muscle - Anatomy Section 38: Muscle - Anatomy 38-1 - - PowerPoint PPT Presentation

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Section 38: Muscle - Anatomy Section 38: Muscle - Anatomy 38-1 - - PowerPoint PPT Presentation

Jun 24, 2023 151 likes •254 views

Section 38: Muscle - Anatomy Section 38: Muscle - Anatomy 38-1 Muscle types: cardiac muscle: composes the heart smooth muscle: lines hollow internal organs skeletal (striated or voluntary) muscle: attached to skeleton via

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Section 38: Muscle - Anatomy Section 38: Muscle - Anatomy

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  • Muscle types:

– cardiac muscle: composes the heart – smooth muscle: lines hollow internal organs – skeletal (striated or voluntary) muscle: attached to skeleton via tendon & movement

  • Skeletal muscle 40-45% of body weight

– > 430 muscles – ~ 80 pairs produce vigorous movement 80 pa s p oduce go ous

  • e

e t

  • Dynamic & static work

Dynamic: locomotion & positioning of – Dynamic: locomotion & positioning of segments Static: maintains body posture

38-2 From: Ju

– Static: maintains body posture

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38-3 From: Garner

Marieb, 1997

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SLIDE 4

38-4 From: Garner

Marieb, 1997

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SLIDE 5

38-5 From: Garner

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Muscle Architecture - Macro Muscle Architecture Macro

  • Key Words:

Key Words:

  • tendon
  • Epimysium
  • Fasciculae
  • Fasciculae
  • Perimysium
  • muscle fibers
  • Endomysium
  • Endomysium
  • myofibril

38-6 From: Legh

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SLIDE 7

38-7 From: Garner

Marieb, 1997

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Muscle Architecture - Micro

  • Key Words:
  • sarcomere
  • Actin -double strand, wound

Actin double strand, wound

  • Myosin- twisted golf clubs, heads

facing out in a spiral fashion down the bundled tails

  • Z- line , M - line
  • cross bridges

38-8 From: Legh

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SLIDE 9

38-9 From: Peeler