Jr muscular system
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Jr muscular system

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Jr muscular system Jr muscular system Presentation Transcript

  • JUNIOR MUSCULAR SYSTEM Janet. J. Nelson RN,CMA
  • INTRO• DID YOU KNOW? – There are more than 700 muscles – Muscles make up 40% of our body weight – Bones make up about 18% of body weight – Bones make up the bodies framework BUT muscles move the bones and create movement – Muscles never “totally” relax. Even when asleep some muscles are in contraction – Do all muscles cells work all day long? – NO!!! Some muscle cells work (contract) while others relax
  • MUSCLE PROPERTIES• Contractility• Excitability (Irritability)• Extensibility• Elasticity
  • TYPES OF MUSCLE
  • FUNCTIONS• Movement • Peristalsis• Heat Production • (Thermogenesis)• Maintain Body Posture & Position• Stabilize Joints• Support soft tissue• Guard entrances and exits
  • CONNECTIVE TISSUE ORGANIZATION
  • SARCOMERE
  • VIEW ADAM ESSENTIALS• SKELETAL MUSCLE ANIMATION
  • • TENDON APONEUROSIS
  • Sarcomere animation• http://lessons.harveyproject.org/development/muscl e/swstfast.html
  • game• http://media.pearsoncmg.com/bc/bc_marieb_ehap_ 8/activities/chapter6/Act6B.html
  • How myosin heads shorten sarcomere• http://www.getbodysmart.com/ap/muscletissue/men u/menu.html
  • CONTRACTION OF SKELETAL MUSCLE• NERVOUS IMPULSE: – Neuromuscular junctions – Acetycholine – Crossbridges cause sliding of sarcomere (muscle shortening) – Muscle shortens – Breakdown of acetycholine (cholinesterase) – Crossbridges let go and sarcomere returns (muscle lengthens)
  • CONTRACTION CONTINUED.• Skeletal muscle contracts only if stimulated.• Skeletal muscle contractions can vary• If nerve supply is destroyed muscle can become flaccid
  • NAMING MUSCLE HINTS• ACTION:• DIRECTION OF FIBERS• MUSCLE LOCATION• NUMBER OF DIVISIONS• SHAPES OF MUSCLE• POINTS OF ATTACHMENT• SIZE OF MUSCLE• MUSCLE DIRECTION
  • OCULOMOTOR MUSCLES
  • CHEST MUSCLES
  • PECTORALIS MINOR
  • ARM MUSCLES
  • ANTERIOR ARM
  • POSTERIOR ARM
  • Diaphragm
  • Intercostal MusclesRemember ‘inter-” means between
  • Abdominal Muscles
  • Abdominal Muscles
  • Perineal Muscles
  • Female Perineum
  • Male Pelvic Floor
  • Muscles of the Hip
  • Thigh muscles
  • Anterior lower leg
  • Posterior lower leg