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| 1. |
A portal system is a system in whichA. A vein begins from an organ and ends in heartB. An artery breaks up in an organ & restarts by the union of its capillariesC. The blood from gut is brought in to kidneys before it is poured in to heartD. A vein breaks up in an organ in to capillaries & restarts by their union as a new vein in the same organ |
| Answer» Correct Answer - 4 | |