THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The middle part of the small intestine. It is between the duodenum (first part of the small intestine) and the ileum (last part of the small intestine). The jejunum helps to further digest food coming from the stomach.

Detailed explanation-2: -The fourth (ascending) part (2.5 cm) continues as the jejunum. The duodenum continues into the jejunum at the duodenojejunal flexure.

Detailed explanation-3: -It is divided into three parts: the duodenum, jejunum and ileum. The beginning portion of the small intestine (the duodenum) begins at the exit of the stomach (pylorus) and curves around the pancreas to end in the region of the left upper part of the abdominal cavity where it joins the jejunum.

Detailed explanation-4: -Etymology. Jejunum is derived from the Latin word jējūnus, meaning “fasting.” It was so called because this part of the small intestine was frequently found to be void of food following death, due to its intensive peristaltic activity relative to the duodenum and ileum.