The point at which the small intestine changes from the jejunum to the ileum is marked by a change in the diameter of the intestine.

Question

Quizplus · Accepted Answer

The transition from the jejunum to the ileum is not marked by a distinct change in diameter but rather by subtle changes in the intestinal wall, such as a decrease in the thickness of the intestinal wall, a reduction in the number of circular folds (plicae circulares), and a change in the density of villi. There is no abrupt change in diameter that demarcates the two sections.

The Point at Which the Small Intestine Changes from the Jejunum