| portal system n. A system of blood vessels that begins and ends in capillaries. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  portal system - system of veins that carry blood from the abdominal organs to the liverhepatic portal vein, portal vein, vena portae, portal - a short vein that carries blood into the liver vascular system - the vessels and tissue that carry or circulate fluids such as blood or lymph or sap through the body of an animal or plant |
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