The hepatic portal vein in frogs is unusual in that it is divided into two portals, the hepatic and the renal. In higher vertebrates, the hepatic portal system is the only one present.
hepatic portal system
The hepatic (portal) system refers to the blood vessels that carry blood from the intestines, stomach, pancreas and spleen to the liver. Blood containing nutrients or drugs absorbed from the intestine is transported by the hepatic portal system to the liver for metabolism before distribution to the rest of the body.
The primary organ in the hepatic system is the liver. In general, "hepa" means "liver" in science; for example, hepatitis = disease of the liver, hepatocellular carcinoma = liver cancer.
The hepatic portal system basically consists of the hepatic portal artery, responsible for taking the products of digestion from the small intestine to the liver, where they are broken down further, cleaned of any microbes, and sent to all the body cells via the hepatic portal vein.
It is called the hepatic portal circulation. A portal system is a system of blood vessels that begin in capillaries and end in capillaries without passing through the heart. The hepatic portal system begins in the capillaries in the digestive tract wall and ends in the capillaries in the liver.
The source of blood in the hepatice portal system is the blood in the circulatory system itself. The hepatic portal is not seperate from the rest of the system, it is just a minor detour that takes blood from the digestive organs towards the liver where it can get further processing.
The answer is the Hepatic Portal System.
Hepatic portal system (vein)
THE LIVER
Renal circulation, receiving about 20% of cardiac output, branches from the abdominal aorta and returns to the ascending vena cava. Hepatic circulation is the system of veins made of the hepatic portal vein and its tributaries.
They go first to the liver via the hepatic portal vein.