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The horses circulatory system and blood vessel system

horses circulatory system

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 The horses circulatory system is a very large and complex system made up of veins and arteries. The blood is the pumped under enormous pressure from the heart along the arteries which have thick muscular walls to deal with the pressure. It oxygenates the body and the internal organs.


  • The circulatory system is based upon the heart - a hollow, muscular organ in the chest cavity. It pumps the blood around the body and is divided into four separate compartments .
  • Blood from the right ventricle goes to the lungs to be oxygenated and then is returned to the left ventricle.
  • Blood from the left ventricle is pumped all through the  body in arteries.
  • Arteries repeatedly branch and diminish in size until they become microscopic capillaries.
  • Capillaries permit necessary interchange between blood and tissue. They eventually join up to produce veins, which convey blood to the right atrium and from there to the right ventricle.
  • A horse of average size has approximately 50 pints (28 litres) which circulate through his system every 40 seconds.



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