Usually, the 1-way valves in these veins hold the blood flowing proficiently from gravity up in the direction of the guts. Varicose veins produce when there are actually faulty valves in the veins and weakened vein walls. mahasiswa ugm racik pola modal receh bocoran pola emas mahjong ways 2mahir mahjong https://www.sgvascularctr.com/varicose-vein-treatment-in-singapore-from-the-perspective-of-a-vascular-surgeon/