The Portal Venous System

In a portal system, blood flows from a capillary bed through veins to another capillary bed. It differs from normal venous return because it is not taken straight to the heart.

Hepatic portal circulation is a human anatomy system of veins comprising tributaries. It is also known to be called portal venous system. It is for directing blood from parts of the gastrointestinal tract to the liver.

The answer is the hepatic portal vein,Unlike most veins, the hepatic portal vein does not drain into the heart. Rather, it is part of a portal venous system that delivers venous blood into another capillary system, namely the hepatic sinusoids of the liver. The hepatic portal vein (often simply portal vein) is a vein in the abdominal cavity that drains blood from the gastrointestinal tract

Humans have a hepatic portal system that brings all the venous flow from the digestive system into the liver. Reptiles have a renal portal system, which brings blood from internal organs to their kidneys, mostly because their digestive tract and urinary tract only have the cloaca to eliminate waste from their body. Since humans have separate systems for eliminating waste, the anus and urethra, the human body, like all other mammals, developed a hepatic portal system.