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Blood Supply

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    Brian W.
    GB
    Brian W.

    The lungs ,liver and heart have two blood supply's, one is a functional supply to be worked on by the organ, the other is a nutrient supply which provides blood in the usual exchange of materials between body cells and the blood. The collateral circulation is a special organisation of blood vessels around a major joint or area of the body, the purpose of this is to ensure that there is a supply of blood in case one or more of the blood vessels become damaged. There are several blood vessels included so that there will always be an alternate route. End arteries supply the heart and the brain they are the only supply of blood to the organs, if the end artery is damaged and is unable to supply blood the tissue that area will die, A portal vein is a venous blood vessel, it begins with capillaries and ends with capillaries in another area. The most important portal vein in the body is called the hepatic portal vein, it comes from the capillaries of the digestive system to the capillaries /sinusoids of the liver.

    Brian W.
    GB
    Brian W.

    The heart and the liver has two blood supplies, how ever it also says that the heart has only one blood supply and that is the 'end artery'.??

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