True statement regarding poal venous system is?
Whole system is valve less REF: BDC 4th edition vol II p. 268-71, Gray's Anatomy 39th edition p. 1218 In adults, the poal vein and its tributaries have no valves. In fetal life and for a sho postnatal period valves are d emonstrable in its tributaries, but they usually atrophy. Rarely some persist in an atrophic form into adulthood.
Valves are present at the junction of superior mesenteric aery and splenic aery
Whole system is valve less
Valves are present in the intrahepatic system
There are about 10-12 valves along the entire course