A venous valve is bicuspid (getting two leaflets) which is formed by an infolding of A part of the tunica intima on possibly facet with the lumen from the veins. The leaflets are strengthened with collagen, and elastic fibres, and protected with endothelium.[ten] The endothelial cells around the surfaces with http://sgvascularctr.com/understanding-venous-leak-treatment-in-singapore/