Blood vessels

HideShow resource information
  • Created by: z_mills1
  • Created on: 05-06-14 14:29
View mindmap
  • Blood vessels
    • Arteries and arterioles
      • arteries are thick-walled, high pressure vessels which carry blood away from the heart (to the tissues)
      • largest artery in the body is aorta
      • constant subdivision decreases the diameter of the arteries - now become arterioles which are found further from the heart
    • Veins and venules
      • veins are thin-walled, low pressure vessels which have valves and carry blood to the heart
      • venules are the smaller veins and transport blood from the capillary bed to the veins
      • veins gradually increase in thickness the nearer they get to the heart
      • veins contain pocket valves which prevent the back flow of blood
    • Capillaries
      • capillaries are tiny blood vessels supplying nutrients to cells and removing waste materials
      • they are just thin enough to red blood cells to flow through their wall - allowing gaseous exchange to occur
    • Structure of arteries and veins
      • inner endothelium - allows blood to flow smoothly without friction
      • middle layer of smooth muscle and elastic fibres
      • outside fibrous layer


No comments have yet been made

Similar Physical Education resources:

See all Physical Education resources »See all blood transportation resources »