Blood flow

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  • Created by: siobhan
  • Created on: 05-05-13 17:37
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  • Blood Flow
    • Blood flows through the body in three main types of blood vessel: the arteries, veins and capillaries
      • Capillaries are narrow, thin-walled vessels and carry blood through organs and allow the exchange of substances with all the living cells in the body
      • Veins have thinner walls than arteries and often have valves along their length to prevent backflow of blood
      • Arteries carry blood away from the heart and have thick walls containing muscle and elastic tissue
    • The heart keeps blood flowing through the blood vessels. if the blood vessels are blocked or too narrow the blood will not flow efficiently. Then organs will be deprived of oxygen and nutrients
      • Stents can be inserted to keep blood vessels open. this is particularly beneficial when coronary arteries become narrowed due to fatty deposits, cutting off the blood supply to the heart muscle

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