The blood in the veins of the legs works against gravity in order to return upwards to the heart. The blood is moved up towards the heart by one-way valves in the veins. When the leg muscles contract ...

Both varicose and spider veins result when valves designed to keep blood from running backward away from the heart and back down into the leg fail or become loose and flabby -- allowing backwash ...

“Varicose veins are those swollen, twisted veins you usually see on the legs and feet”, he explains. “They happen when the valves in the veins that help blood flow get weak or ...

For this process to occur, veins contain one-way valves that open and close, helping the blood flow against gravity toward the heart. If these valves become damaged and do not fully close ...

It is used to remove a damaged vein and prevent complications of vein damage. If several valves in a vein and the vein itself are heavily damaged, the vein (or the diseased part of the vein) is ...

Engineers at Georgia Tech developed the prosthetic vein valve shown here to help improve the lives of those suffering from a condition known as chronic venous insufficiency. Disclaimer ...

They also use the movement of nearby muscles to move it along. The veins also have valves that keep blood from flowing backward and pooling in your arms and legs. When your blood doesn't move as ...

from each other, release of the lower finger alone caused the veins to fill immediately from below but on release of the tipper finger they filled from above only down to the nearest valve.

Varicose veins are a common vascular condition that can cause discomfort, swelling, and aesthetic concerns. While visible ...