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Deep veins are deeper in the body and have corresponding arteries. Perforator veins drain from the superficial to the deep veins. [16] These are usually referred to in the lower limbs and feet. [17] Superficial veins include the very small spider veins of between 0.5 and 1 mm diameter, and reticular or feeder veins. [18] Venous plexuses
Though veins might make it appear as such, human blood is never naturally blue. [3] The blue appearance of surface veins is caused mostly by the scattering of blue light away from the outside of venous tissue if the vein is at 0.5 mm deep or more. Veins and arteries appear similar when skin is removed and are seen directly. [4] [5]
A list of veins in the human body: Veins of the heart. Coronary sinus. Great cardiac vein; Oblique vein of left atrium; Middle cardiac vein; Small cardiac vein
Varicose veins are veins that have become enlarged and twisted, and this most commonly happens in the veins of the leg. How do they form? Well - the arterial circulation, going away from the heart, is a high pressure system, meaning the movement of blood is dependent on high pressures that essentially push it through the arteries, on the order ...
In anatomy, the venae cavae (/ ˈ v iː n i ˈ k eɪ v i /; [1] sg.: vena cava / ˈ v iː n ə ˈ k eɪ v ə /; from Latin 'hollow veins') [2] are two large veins (great vessels) that return deoxygenated blood from the body into the heart. In humans they are the superior vena cava and the inferior vena cava, and both empty into the right atrium ...
Atherosclerosis: Overview. This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Atherosclerosis happens when a fatty substance called plaque builds up inside your arteries.
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Thrombophlebitis causes include disorders related to increased tendency for blood clotting and reduced speed of blood in the veins such as prolonged immobility; prolonged traveling (sitting) may promote a blood clot leading to thrombophlebitis but this occurs relatively less.
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