What is the difference between portal vein and hepatic vein?

What is the difference between portal vein and hepatic vein?

The portal vein (which is rich in nutrients and relatively high in oxygen) provides two thirds of blood flow to the liver. The hepatic veins drain the liver into the inferior vena cava. When portal vein blood flow increases, hepatic artery flow decreases and vice versa (the hepatic arterial buffer response).

Where does the hepatic portal vein come from?

The hepatic portal vein (Figs 4.60, 4.61) is formed by the union of the superior mesenteric and the splenic veins behind the neck of the pancreas. The inferior mesenteric vein may join the splenic vein or the superior mesenteric vein. The portal vein thus drains blood from most of the gastrointestinal tract.

What is different about the hepatic portal system?

The hepatic portal system is the system of veins comprising the hepatic portal vein and its tributaries. The liver consumes about 20% of total body oxygen when at rest, so the total liver blood flow is quite high. Blood flow to the liver is unique in that it receives both oxygenated and partially deoxygenated blood.

What is the difference between the liver in humans versus the liver in pigs?

Pigs have all of the same thoracic and abdominal organs as humans. There are small differences in a few organs. Liver – the human liver has four lobes: right, left, caudate and quadrate. The fetal pig liver has five lobes: right lateral, right central, left central, left lateral, and caudate.

What is special about the hepatic portal vein?

The hepatic portal vein is a vessel that moves blood from the spleen and gastrointestinal tract to the liver. The portal vein is not a true vein, which means it does not drain into the heart. Instead, it brings nutrient-rich blood to the liver from the gastrointestinal tract and spleen.

What is the main function of hepatic portal vein?

Venous blood rich in nutrients enters the liver from the hepatic portal venous system. The hepatic portal vein drains the digestive tract and efficiently transports metabolic building blocks (sugars and amino acids) directly to the liver, where they are reconstituted into more complex molecules.

What is the function of the liver in a pig?

it makes bile, which is used in digestion, it makes proteins and immune cells, and. it filters and breaks down toxic chemicals from the blood.