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What is Vascular system?

Dr Mamata S.H.

Dr Mamata S.H.

  Kalyan nagar, Bengaluru     Feb 9, 2017

   1 min     

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Vascular system is a complex network of blood vessels carrying blood to and from the heart. Veins are blood vessels that return blood from all parts of the body towards the heart. Cells use nutrients and oxygen from the blood to perform their functions and they release the waste products (such as carbon dioxide) into the blood which is carried by the veins. 

Blood in the veins is then transported to the heart and returned to the lungs where the waste carbon dioxide is released and more oxygen is loaded by the blood and taken back to the rest of the body by the arteries. The veins closer to the skin surface are called superficial veins. The veins that are deeper (closer to the bones-deep to the muscles) are called deep veins. There are also other veins that connect the superficial veins to the deep ones which are called the perforating veins. 

These veins have valves that play essential role in unidirectional blood flow from the lower limb towards heart and are normally situated along the entire course of the lower limb (plenty being in the lower leg and gradually reduce in number as the vein courses towards the abdomen and almost absent in the deep veins of the abdomen). Calf muscles need a special mention here because of the unique property of pumping activity. CALF is called ‘THE HEART OF THE LOWERLIMB’. Active pumping action promotes good venous return from the lower limbs to the heart. 

Tags:  Vascular system,heart,lower limbs,varicose veins,

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