Answer
The hepatic portal system has the following tributary vessels that feed into the hepatic portal vein:
1. The splenic vein
2. The inferior mesenteric vein
3. The superior mesenteric vein
The system has two capillary beds between the arterial supply and the final venous drainage
First there is the capillary bed of the digestive system, from which blood flows through venules and veins and tributaries into the hepatic portal vein.
The hepatic portal vein carries venous blood from the digestive tract to the liver. This blood also passes through the liver capillary net work and sinusoids . Blood from the hepatic artery mixes with the blood from the portal vein in the liver. This mixed blood percolates through the liver sinusoids . Finally, it leaves the liver by veins and the three hepatic veins and reaches the inferior vena cava .
Work Step by Step
The inferior mesenteric vein drains the distal large intestine, and the rectum.The superior mesenteric vein drains all of the small intestine, part of the large intestine, and the stomach.
The splenic vein. drains the spleen , the pancreas and part of the stomach; it joins the superior mesenteric vein to form the
hepatic-portal vein
Blood from the digestive tract flows to the liver through the hepatic portal vein. In the liver sinusoids, hepatic arterial blood mixes with the blood from the hepatic portal vein. As the blood slowly percolates through the liver sinusoids it is processed by the hepatocytes and leaves the liver, eventually, by hepatic veins for the inferior vena cava.
