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