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