Additional Applied Science - health, exercise and nutrition

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Blood is made up of four things

Red blood cells - transport oxygen from the lungs to all the cells

White blood cells - to fight infection

Platelets - to help blood to clot at the site of a wound

Plasma liquid that carries everything about

Three types of blood vessels

Arteries - carry blood away from the heart

Capillaries - exchanging materials at the tissues

Veins - carries blood to the heart

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Blood vessels functions


  • Carries blood under pressure
  • The walls are elastic and strong
  • Press down on the artery lightly, you can feel the pulse every time the heart beats


  • Really small
  • carry blood close to every cell in the body
  • supply oxygen and nutrients and take away waste like Co2
  • Walls are thick
  • Walls are permeable because the substances can move in and out


  • Take blood back to the heart
  • The blood is at low pressure
  • There is a bigger lemen 
  • They have valves to keep the blood flowing in the right direction
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The heart

  • Pumps blood around the body
  • Right side of the heart pumps blood to the lungs
  • Left side of the heart pumps blood to the rest of the body
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