The correct option is D Intestine
The Hepatic portal system is the vascular connection between the digestive tract and the liver. The hepatic portal vein carries blood from the intestine to the liver before it is delivered to the systemic circulation.
Hepatic portal veins carry the deoxygenated blood from the gastrointestinal tract, gallbladder, pancreas, and spleen to the liver. It carries the nutrient-rich blood to the liver which is further processed there and returned back to the heart via inferior vena cava.
So, the correct answer is option D.