Varicose veins

From Healthpages.wiki
Jump to: navigation, search
Varicose veins are veins that have become enlarged and tortuous (twisted). The term commonly refers to the veins on the leg although varicose veins can occur elsewhere. Veins have leaflet valves to prevent blood from flowing backwards (retrograde flow or reflux). Leg muscles pump the veins to return blood to the heart (the calf muscle pump mechanism) against the effects of gravity.
Links
https://en.wikipedia.org/wiki/Varicose veins