The Portal System of Veins – Human Anatomy
The Portal System of Veins The portal system (Fig. 591) includes all the veins which drain the blood from the abdominal part of the digestive tube (with the exception of the lower part of the rectum) and from the spleen, pancreas, and gall-bladder. From these viscera the blood is conveyed to the liver by the portal vein.
https://theodora.com/anatomy/the_portal_system_of_veins.html
Portal system | anatomy | Britannica
In circulatory system: The blood vessels Lower vertebrates have two so-called portal systems, areas of the venous system that begin in capillaries in tissues and join to form veins, which divide to produce another capillary network en route to the heart. They are called the hepatic (liver) and renal (kidneys) portal systems.
https://www.britannica.com/science/portal-system
Portal Venous System – an overview | ScienceDirect Topics
The portal venous system drains the intestines, pancreas, and spleen with numerous collateral anastomoses to other venous beds of the abdomen. There is a mixing of portal and systemic blood circulation within the sinusoids, and all the blood eventually drains from the liver via the hepatic veins to the inferior vena cava.
https://www.sciencedirect.com/topics/neuroscience/portal-venous-system
Hepatic portal system – Wikipedia
The portal venous system is responsible for directing blood from parts of the gastrointestinal tract to the liver. Substances absorbed in the small intestine travel first to the liver for processing before continuing to the heart. Not all of the gastrointestinal tract is part of this system.
https://en.wikipedia.org/wiki/Hepatic_portal_system
Portal venous system – Anatomy
The portal venous system includes all the vessels which collect venous blood from the abdominal part of the digestive tract (except for the lower part of the rectum) and the spleen, pancreas, and gallbladder. Blood from these organs enters the inferior surface of the liver through the large hepatic portal vein.
https://www.anatomy.net/portal-venous-system/
Hepatic portal system anatomical diagram – Anatomy Note
In this image, you will find Right, Liver, Gallbladder, Cystic, Hepatic portal v, Small intestine, Superior intestine, Superior mesenteric v., Middle colic v., Right colic v., Intestinal vv., Ascending colon, Superior rectal v., Rectum, Sigmoid colon, Sigmoid vv., Descending colon, Left colic v., Transverse colon, Right gastro-omental v., Inferior mesenteric, Left gastro-omental, Stomach, Spleen Short gastric, Splenic v. in it.