The Human Heart

• Arteries


  blood vessels that carry blood away from the heart
• Pulmonary


  the lungs
• Pulmonary artery


  blood vessels that carry oxygen-poor blood from the right side of your heart towards the lungs
• Pulmonary vein


  veins that transfer oxygenated blood from the lungs to the heart
• Aorta


  largest artery of the body that carries blood from the heart to the circulatory system
• Valves


  prevents backward flow of the blood
• Right ventricle


  pumps the oxygen-poor blood to the lungs
• Left ventricle


  pumps the oxygen-rich blood to the body
• Left atrium


  receives oxygen-rich blood from the lungs and pumps it to the left ventricle
• Blood pathway


  right atrium, tricuspid wave, right ventricle, pulmonary valve, pulmonary artery, lungs, pulmonary vein, left atrium, mitral valve, left ventricle, aortic valve, aorta
• Steps of blood going through the heart

  1. vena cava: carries/ bring blood from the body
  2. Right atrium
  3. Right ventricle
  4. Pulmonary artery
  5. lungs carry oxygenated blood to the
  6. pulmonary vein
  7. left atrium
  8. left ventricle
  9. body
  10. restart from vena cava

  steps 1-4 carries deoxygenated blood throughout the body
• What is the heart?

  the heart is made from cardiac muscle which never gets tired. It pumps blood around the body and up to the lungs by contracting and relaxing. It has valves to ensure blood flows in one direction
• The three types of blood/network

  arteries

  veins

  capillaries
• Arteries

  • carries blood away from the heart to the organs
  • the blood is under high pressure so the walls must be able to stretch and recoil
  • generally carries deoxygenated blood
• What artery has only one special function

  pulmonary artery is the only artery that carries deoxygenated blood
• Veins

  • carries blood from organs back to the heart
  • under low pressure
  • must allow easy blood flow and prevents backwards blood flow
  • generally carries deoxygenated blood
• What vein has only one special function

  pulmonary vein is the only vein that carries deoxygenated blood
• Capillaries

  • carries blood through organs
  • permeable
  • one cell thick