Venous Disease - Johns Hopkins Medicine Veins are thin-walled structures inside of which a set of valves keeps blood in the body flowing in one direction The heart pumps oxygen-rich blood to the body’s tissues through thicker-walled arteries; the veins return that blood to the heart
Overview of the Venous System - Heart and Blood Vessel Disorders . . . Many veins, particularly those in the arms and legs, have one-way valves Each valve consists of 2 flaps (cusps or leaflets) with edges that meet Blood flowing toward the heart pushes the flaps open like a pair of one-way swinging doors
Vein - Wikipedia In the circulatory system, blood first enters the venous system from capillary beds where arterial blood changes to venous blood Large arteries such as the thoracic aorta, subclavian, femoral and popliteal arteries lie close to a single vein that drains the same region
Venous - definition of venous by The Free Dictionary 1 Of or relating to the veins in the body: venous circulation 2 Of, relating to, or being the blood in the veins or pulmonary arteries that is usually dark red as a result of low oxygen content 3 Having numerous veins, as a leaf or the wings of an insect