Blood Vessels

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  • Created by: tiacoles
  • Created on: 29-02-16 19:53

Arteries, Capillaries and Veins


  • Carry blood from the heart to the body.
  • Thick and muscular walls with elastic tissue to cope with high pressure produced by heartbeat. 
  • The inner lining (endothelium) is folded, allowing the artery to expand - also helps cope with pressure.
  • All arteries carry oxygenated blood except for the PULMONARY - deoxygenated to the lungs. 


  • Substances like glucose and oxygen are exchanged between cells and capillariesvso they are adped for efficient diffusion (one cell thick)
  • Capillaries branch off of arteries and connect to veins. 


  • Veins take blood back to the heart under low pressure.
  • They are wider than arteries with very little elastic or muscle tissue. 
  • Veins contain valves to stop the blood flowing backwards.
  • Blood flow through the veins is helped by contraction of the body muscles surrounding them. 
  • All veins carry deoxygenated blood except for the PULMONARY - oxygenated blood to the heart from the lungs. 


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