Muscular System

• Functions of Muscular System

  1.Facilitates movement

  2.Creates Heat

  3.Maintains Posture
• Muscle Structure - Voluntary


  Can see and feel

  e.g biceps and triceps
• Muscle Structure - Involuntary


  Not controlled by will

  Control the internal hollow organs

  e.g digestive system
• Muscle Structure - Cardiac


  Only found in the heart

  Criss Cross fibres

  e.g the heart
• Muscle Tone


  The tension in a muscle at rest

  Ready for action at all times
• Muscle Strength


  Muscles ability to contact and create force in response to resistance

  Needs o2 and glucose to work

  warm up = more oxygen

  cold = not enough o2, muscle seizes up

  Latic acid builds up to stop you (cramps)
• Isotonic Contraction (Concentric)


  Contracts the muscle, makes it shorter
• Isotonic Contraction (Eccentric)


  Relaxing the muscle in a controlled way
• Isometric Contraction


  Holding an action
• Pathologies (5)

  Lumbago

  Tendonitis

  Repetitive strain Injury

  Cramp

  Sprain