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portal circulation - translation to russian
![General diagram of a portal venous system, for example, this occurs in the [[hypophyseal portal system]] between the [[hypothalamus]] and the [[anterior pituitary gland]].](https://commons.wikimedia.org/wiki/Special:FilePath/Portal venous system.png?width=200 "General diagram of a portal venous system, for example, this occurs in the [[hypophyseal portal system]] between the [[hypothalamus]] and the [[anterior pituitary gland]].")
общая лексика
кровообращение в системе воротной вены
общая лексика
система воротной вены
портальная система
Definition
Wikipedia
In the circulatory system of vertebrates, a portal venous system occurs when a capillary bed pools into another capillary bed through veins, without first going through the heart. Both capillary beds and the blood vessels that connect them are considered part of the portal venous system.
Most capillary beds drain into venules and veins which then drain into the heart, not into another capillary bed. There are three portal venous systems – the hepatic portal system, the hypophyseal portal system, and the renal portal system. Unqualified, portal venous system usually refers to the hepatic portal system. For this reason, portal vein most commonly refers to the hepatic portal vein.
The functional significance of such a system is that it transports products of one region directly to another region in relatively high concentrations. If the heart were involved in the blood circulation between those two regions, those products would be spread around the rest of the body.
