Muscular System - muscles, functions & muscle contractions

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  • Created by: mellis98
  • Created on: 30-10-13 13:27
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  • Muscular System
    • MUSCLES
      • CARDIAC
        • INVOLUNTARY MUSCLE - found in heart - contracts & relaxes continuously
      • SMOOTH
        • INVOLUNTARY MUSCLE - around organs (intestines) - provide nutrients
      • SKELETAL
        • VOLUNTARY MUSCLE - attached to skeleton by tendons
    • FUNCTIONS
      • MOVEMENT
        • muscles contract causes tendons to pull on bone to move
      • SHAPE
        • more defined better body shape
      • PROTECTION
        • protect & keep abdominal organs in place
      • CIRCULATION
        • muscles need to squueeze veisnto get blood back to heart
      • POSTURE
        • good muscle tone - bones in correct position
      • GENERATE BODY HEAT
        • when muscles contract & relax produce heat energy
    • MUSCLE CONTRACTIONS
      • ISOMETRIC
        • force produced with no movement e.g. tug of war/rugby scrum
      • ISOTONIC
        • force produced with movement
        • CONCENTRIC - muscle shortens under tension
        • ECCENTRIC - muscle lengthens under tension
  • INVOLUNTARY MUSCLE - around organs (intestines) - provide nutrients
  • more defined better body shape
  • ECCENTRIC - muscle lengthens under tension

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