In poal venous system, valves are present at
D i.e. The whole system is valvelessLike vena Cava, the poal vein and its tributaries are without valvesQ. The normal pressure in poal vein is 3-5 mmHg and the increase in venous pressure is distributed throughout the splanchenic circulation.
The junction of superior mesentric aery with the splenic aery
Within the poal vein only
In the intrahepatic poion of poal vein
The whole system is valveless