| 词汇 | portal-system |
| 释义 | portal system noun[ C ] anatomy specializeduk /ˈpɔː.təl ˌsɪs.təm/ us /ˈpɔːr.təl ˌsɪs.təm/(alsoportal venous system) a system of blood vessels in which blood starts in a set of capillaries(= small, narrow blood vessels), flows into larger blood vessels, and then into another set of capillaries before continuing around the body: hepatic portal systemOral oestrogens are metabolized through the hepatic portal system. hypophysial portal systemThe hormone is secreted into the hypophysial portal system. A scan showed air in the wall of the stomach and portal venous system. The venous drainage of the gut passes through the liver via the portal system, clearing the blood of excess vasoactive substances. The increase in venous pressure causes alterations in the organs drained by the portal system, such as the liver and the gut. The circulatory system & blood ABO accessory pathway adventitia adventitial ANA auricle bicuspid valve femoral artery gamma globulin glomus granulocyte haematogenous haemic phagocyte precava pulmonary artery pulmonary vein pulmonic Purkinje fibre tricuspid valve |
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