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A portal system is a system in which...

A portal system is a system in which

A

A vein begins from an organ and ends in heart

B

An artery breaks up in an organ & restarts by the union of its capillaries

C

The blood from gut is brought in to kidneys before it is poured in to heart

D

A vein breaks up in an organ in to capillaries & restarts by their union as a new vein in the same organ

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Assertion : A portal system start and ends with blood capillaries. Reason : A portal system collec blood from a organ or organs and distribute this blood in another organ