Circulatory system and disease

• What is coronary heart disease and what foes it cause

  -coronary artery narrow

  -less o2 ti muscles

  -strains heart

  -heart attack
• Where are the pacemaker cells

  Right atrium wall
• Good and bad of stents

  Fast recovery

  need drugs to prevent blood clots

  risk heart attack

  infection surgery

  quick surgery

  last long
• Whats the good and bad cholesterol

  LFL

  HDL
• Good and bad of statins

  Less bad cholesterol

  less chsnce heart attack ,stoke,chd

  long term headache kidney liver failure
• Risk of replacing valves

  Blood clot

  valve leaka blood or os stiff doesnt let pass
• Benefit and drawback of mechanical heart


  Less rejection

  bleeding and infection

  wear out motors

  drugs for clots
• What is artificial blood

  Saline helps increase volume lets blood cells replenish

  still needs transfusion
• Why does the artery have thick muscle

  String elastic fibres spring back
• Why are capillary walls permeable


  Used exchange surfaces
• Why is left dide of heart muscle thicker

  Pumps high pressure blood to body crlls