The jejunum is the second part of the small intestine in humans and most higher vertebrates, including mammals, reptiles, and birds. Its lining is specialized for the absorption by enterocytes of small nutrient molecules which have been previously digested by enzymes in the duodenum.

Nov 9, 2022 · The jejunum is the middle portion of the small intestine, connecting the first portion of the small intestine (duodenum) with the last section (ileum).

Nov 11, 2021 · The jejunum makes up about two-fifths of the small intestine. The main function of the jejunum is absorption of important nutrients such as sugars, fatty acids, and amino acids.

Feb 13, 2025 · Anatomically, the small bowel can be divided into three parts: the duodenum, jejunum, and ileum. In this article, we shall examine the anatomy of the small intestine – its structure, neurovascular supply, and clinical correlations.

Oct 30, 2023 · The jejunum is the middle of the three parts of the small intestine between the duodenum and ileum. Its arterial supply is provided by the jejunal arteries, while the innervation by the celiac and superior mesenteric plexi together with the vagus nerve.

Jan 16, 2025 · Jejunum is the second of the three segments which, together, make up the small intestine. The beginning of the jejunum is clearly marked by the duodenojejunal flexure, encircled by the Ligament of Treitz.

Jul 22, 2022 · They jejunum is the largest section of the small intestine. It is the chief of nutrient absorbtion in the digestive system. Learn about the mouth, stomach, intestines and the whole GI track.

The jejunum is the second part of the small intestine. It is intraperitoneal and sits in the abdominal cavity, deep to the umbilical region and separated from the anterior abdominal wall by the greater omentum which overlays it. The jejunum is attached to the posterior abdominal wall by the mesentery that carries the superior mesenteric ...

Apr 20, 2024 · The jejunum is the small intestine's middle segment, roughly 2.5 meters long. This portion begins at the duodenojejunal junction, where the gastrointestinal tract continues intraperitoneally. The jejunum contains plicae circulares (muscular flaps or …

5 days ago · The jejunum is the middle segment of the small intestine found between the duodenum and the ileum. Most of the nutrients present in food are absorbed by the jejunum before being passed on to the ileum for further absorption.