The portal system in humans is defined as a system where:

  • A
    $A$ vein starts from an organ and ends in the heart.
  • B
    $A$ vein enters an organ other than the heart and breaks up into capillaries.
  • C
    An artery divides in an organ and starts with the coordination of capillaries.
  • D
    Blood from the intestine goes to the kidney and then into the $IVC$.

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