Which part of the small intestine connects the duodenum and ileum?

The jejunum is the correct answer because it is the middle section of the small intestine that lies between the duodenum and the ileum. The small intestine is divided into three segments: the duodenum, jejunum, and ileum. The jejunum follows the duodenum and precedes the ileum, making it the direct connection between these two sections. This segment is crucial for the absorption of nutrients, as it contains a larger number of folds, villi, and microvilli compared to the other parts, maximizing the surface area for nutrient absorption.

The duodenum is the first part of the small intestine and is responsible for breaking down food with the help of digestive enzymes and bile. The ileum is the final section of the small intestine, which further absorbs nutrients and connects to the large intestine. The colon, while part of the digestive system, is not a section of the small intestine, so it does not serve as a connecting part between the duodenum and ileum.