Diagram Blood Vessels Hepatic Portal System. All of these are correct. Lets take a closer look into that.
The hemolymph is first pumped through the heart into the aorta dispersed into. Is exemplified by the hepatic portal system and the pituitary hypothalamic portal system. They all empty into the system of the hepatic portal vein.
The hepatic portal system is the venous system that returns blood from the digestive tract and spleen to the liver where raw nutrients in blood are processed before the blood returns to the heart.
The umbilical vein. Right middle and left hvs. Is a specialized network of blood vessels. Above is a diagram of an open circulatory system.