Omental Foramen

Liver Falciform ligament

Stomach

Diaphragm

7th rib

Omental Foramen Liver

Anastomosis between right and left gastro-omental (epiploic) arteries

_Greater omentum, gastrocolic portion

Figure 13.16 Lesser omentum extending from the liver to the lesser curvature of the stomach (hepatogastric ligament) and to the duodenum (hepatoduodenal ligament). In it's free margin anterior to the omental foramen (epiploic foramen of Winslow) are the hepatic artery, portal vein, and bile duct (portal triad).

Anastomosis between right and left gastro-omental (epiploic) arteries

_Greater omentum, gastrocolic portion

Figure 13.16 Lesser omentum extending from the liver to the lesser curvature of the stomach (hepatogastric ligament) and to the duodenum (hepatoduodenal ligament). In it's free margin anterior to the omental foramen (epiploic foramen of Winslow) are the hepatic artery, portal vein, and bile duct (portal triad).

on the form of a C-shaped loop and rotates to the right. This rotation, together with rapid growth of the head of the pancreas, swings the duodenum from its initial midline position to the left side of the abdominal cavity (Figs. 13.10 A and 13.17). The duodenum and head of the pancreas press against the dorsal body wall, and the right surface of the dorsal mesoduodenum fuses with the adjacent peritoneum. Both layers subsequently disappear, and the duodenum and head of the pancreas become fixed in a retroperitoneal position. The entire pancreas thus obtains a retroperitoneal position. The dorsal mesoduodenum disappears entirely except in the region of the pylorus of the stomach, where a small portion of the duodenum (duodenal cap) retains its mesentery and remains intraperitoneal.

During the second month, the lumen of the duodenum is obliterated by proliferation of cells in its walls. However, the lumen is recanalized shortly thereafter (Fig. 13.18, A and B). Since the foregut is supplied by the celiac artery and the midgut is supplied by the superior mesenteric artery, the duodenum is supplied by branches of both arteries (Fig. 13.14).

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