portal system

nounAnatomy.

a vascular arrangement in which blood from the capillaries of one organ is transported to the capillaries of another organ by a connecting vein or veins.
(loosely) the hepatoportal system.

Origin of portal system

First recorded in 1850–55

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

There is no renal portal system, excepting unimportant vestiges of such a system in the head kidneys.
Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 | Various
Owing to the development of the common iliac veins there is no renal portal system like that of the Reptilia and Amphibia.
The Works of Francis Maitland Balfour, Volume III (of 4) | Francis Maitland Balfour
The peptones and sugar pass by osmosis into the blood-vessels of the portal system and thence to the liver.
A System of Practical Medicine By American Authors, Vol. II | Various
An attempt at compensation for these evils growing out of the obstruction in the portal system is made by the natural powers.
A System of Practical Medicine By American Authors, Vol. II | Various
From the portal system were absorbed, through the stomach and intestines, the products of digestion.
The Evolution of Modern Medicine | William Osler

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