Muscular

• Cardiac muscle


  Found only in the walls of the heart

  Specialised type of involuntary

  Signals from the brain to the heart to regulate heart rate
• Involuntary


  Found in organs such as digestive and circulatory

  Found in blood vessels contract and relax to distribute blood where it is needed in the body
• Voluntary


  Attached to the skeleton by tendons

  Muscle fibres that are long and thin contract and pull the skeleton causing movement
• Antagonistic muscle pairs


  Muscles work in pairs when one contracts the other relaxes
• Type I


  Aerobically long distance

  Darker more myoglobin

  Good oxygen supply

  Contract slowly work for longer
• Type IIa


  Anaerobically fast paced activities

  Games players for aerobic and anaerobic

  Lighter as less oxygen used

  Contract quickly tire easily
• Type IIx


  Anaerobically for explosive events

  Explosive fires potential for massive power output

  Fatigue very quickly

  Build lactic acid