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Introduction to the Blood Vessels

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    Collette M.
    US
    Collette M.

    Blood vessels are found throughout your body and are continuous.

    Brian W.
    GB
    Brian W.

    The blood vessels run throughout the body and are tubular in shape , this tubular system is continuous with no openings and so is at times referred to as a closed system. In the main there are three types of blood vessel, Arteries, veins and capillaries, there are also arterioles and venules which are small branches from arteries and veins that connect to capillaries. There are abbreviations that are used for blood vessels , A=artery, V =vein, Aa=arteries, Vv=veins, NAVL. The blood vessels walls are generally constructed of three layers , the inner most wall is called the intima the main part of the wall is called media and the outer layer is called the adventita . Arteries and veins which have a similar inner size , the artery will have a thicker wall due to the smooth muscle tissue and the presents of elastic FCT which is a element of the artery make up. The capillary walls have only one layer which is called the intima. Capillary networks are called beds which are the exchange areas for the cardiovascular system, the capillary walls consists of flat single cells, substances move between the blood and the body cells.

    Brian W.
    GB
    Brian W.

    What pressure are the artery's and vessels under.

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