Anatomy General b99f828c All of the following veins lack valves except A Femoral vein B Poal vein C IVC D Dural venous sinuses High-Yield Explanation Veins which do not have valves are:IVCSVCHepatic, ovarian, uterine, renal, emissary, cerebral, pulmonary, and umbilical veinsPoal venous system is a valveless system