The hepatic portal vein of a frog connects

The hepatic portal vein in frogs, connects the intestine and the liver.

In the frog's circulatory system, after digestion, nutrients and other substances absorbed by the intestines are transported via the hepatic portal vein directly to the liver. Once in the liver, these substances can be processed, stored, or further distributed to the rest of the body as needed. This pathway allows for efficient regulation of nutrient levels and detoxification of harmful substances absorbed from the digestive system before they reach the general circulation.