Small Intestines of the Pig
Duodenum:
The first part ascends caudally and cranially ventral to the right lobe of the liver. It forms the sigmoid flexure near the right kidney and ends at the cranial flexure. The descending duodenum courses caudally ventral to the right kidney and ends at the caudal flexure. Here the duodenum turns to the left around the caudal aspect of the root of the mesentery and runs cranially as the ascending duodenum.
Jejunum:
It consists of large number of close coils. The jejunal mass lies mostly to the right of the median plane, extending from the stomach and liver to the pelvic inlet.
Ileum:
It arises from the jejunal mass and ends at the cecocolic junction. At the ileal orifice it forms a projection, the ileal papilla that is connected to the wall of the colon by mucosal folds. Numerous aggregated lymph nodules and solitary nodules are present in the small intestine of the pig