hepatic portal system


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hepatic portal system

[he′pad·ik ′pȯrd·əl ‚sis·təm]
(anatomy)
A system of veins in vertebrates which collect blood from the digestive tract and spleen and pass it through capillaries in the liver.
References in periodicals archive ?
Venous portal systems occur in vessels carrying blood to the liver, namely, the hepatic portal system (Portal vein), and in vessels leading to the pituitary, the hypothalamic- hypophyseal portal system.
The liver is also involved with the first-pass effect; when a drug is swallowed, it is absorbed by the digestive system and enters the hepatic portal system.
Penetration through splanchnic capillaries allows access to the hepatic portal system, at which stage motility decreases and feeding begins.