The cranial part of the midgut forms the lower half of the duodenum, the jejunum, and most of the ileum, and the caudal part develops into the terminal ileum, the cecum, appendix, ascending colon, and proximal two-thirds of the transverse colon.
Between the cranial and caudal parts of the midgut, a vitelline duct connects the developing gut to the yolk sac. Normally, this duct completely regresses. However, remnants may form vitelline cysts, fistulae, or diverticula, the latter often refered to as a Meckel's diverticulum. These are found along the ileum approximately 2 feet from the ileocecal junction. | |