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Question : A portal system is that in which

Answer»

a vein begins from an ORGAN and ends in heart
an ARTERY BREAKS up in an organ and RESTARTS by the union of its capillaries
the blood from gut is brought into kidneys before it is poured into heart
a vein breaks up in an organ into capillaries and restart by their union as a new vein in the same organ 

Answer :D


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