True about valves in poal venous system?
High-Yield Explanation
The whole system is valveless Venous valves help in unidirectional blood flow in veinsThe number of valves is greatest below the knee and decrease in number in the more proximal veins.Valveless veins or venous sytem are- Inferior vena Cava- Common iliac veins- Poal venous system- Cranial sinuses