Basillac veins are located in the subcutaneous fat of upper limbs, ie human arms. They help drain blood from the hands and forearms.
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The fine network of lines on the undersurface of a leaf are called Veins. The water and minerals go to every part of the leaf through these Veins.
The Veins Will Turn Blue
They are called valves, or leaflet valves in the veins, that interlock to prevent backflow of the blood.
Tiny valves in your veins keep blood from backing up. The pumping force of your heart keeps the blood flowing forward. If a valve in your leg stops working properly, the blood seeping back causes varicose veins mainly in your legs, though can occur anywhere.
Arteries carry blood from the heart to other parts of the body. Veins are much smaller vessels that are used to bring the blood back to the heart.