Final answer:
The question is about the anatomy of the portal venous system related to the duodenum and liver. It includes the pathway of the portal vein, its accompanying structures, and how it branches into the liver to form a network (rete mirabile venosum).
Step-by-step explanation:
The student's question pertains to the anatomy of the portal venous system, specifically around the duodenum and liver. The portal vein ascends behind the superior part of the duodenum, and is a content of the ligamentum hepatoduodenale, part of the omentum minus. It lies in front of the foramen omentale (epiploicum). Alongside the portal vein in the ligamentum hepatoduodenale, one can find the proper hepatic artery (to the left of the vein) and the bile duct (to the right). The portal vein ends at the porta hepatis, where it divides into the right and left branches (r. dexter and r. sinister). These branches further divide into smaller branches that terminate in the liver sinusoids forming the rete mirabile venosum.