MCQ IN MEDICINE

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 duodenum is the first part of the small intestine (5-7 m), followed by the jejunum and ileum (in that order); it is also the widest and shortest (25 cm) part of the small intestine.

Detailed explanation-3: -The jejunum and ileum come from the midgut, whereas the duodenum derives from the foregut. Villi and crypts make up the lining of the small intestine. Originally, the small intestine is lined by cuboidal cells up until the ninth week of gestation; then, villi begin to form.