In a portal system
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a vein starts from an organ and ends up in the heart
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a vein enters into an organ other than the heart and breaks up into capillaries
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an artery breaks up in an organ and restarts by union of its capillaries
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the blood from gut is brought into kidneys before it is poured into posterior vena cava
Reveal answer
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Correct answer
Explanation
A portal vein system is characterized by a vein that originates from capillaries in one organ (e.g., capillaries in the gastrointestinal tract), travels to another organ without first returning to the heart, and then breaks into a second capillary network (e.g., in the liver). The hepatic portal system is the classic example.