circulatory systems- the heart

• what is coronary heart disease caused by?

  build up of fatty material called plaque which reduces blood flow
• what is used to keep the coronary arteries open?

  Stents
• people with faulty values can have them replaced with biological valves or mechanical valves
• what do statins do?

  is a drug that reduces cholesterol in the blood which reduces fatty deposits
• what are the advantages of statins?

  reduces the risk of a heart attack and strokes

  increases beneficial cholesterol which helps remove bad cholesterol

  can prevent other diseases
• what is the steps of the right side of the heart?

  blood from the body travels through the vena cava -> right atrium -> right ventricle -> pulmonary artery to the lungs
• what blood does the right side of the heart pump?

  Deoxygenated blood
• what are the steps for the left side of the heart?

  blood from the lungs goes from the pulmonary vein -> left atrium -> left ventricle -> aorta to the body
• what blood does the left side of the heart pump?

  oxygenated blood
• what makes a pacemaker in the heart?

  small electrical impulses