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.
The jejunum lies between the duodenum and the ileum and is considered to start at the suspensory muscle of the duodenum, a location called the duodenojejunal flexure.[4] The division between the jejunum and ileum is not anatomically distinct.[5] In adult humans, the small intestine is usually 6–7 m (20–23 ft) long (post mortem), about two-fifths of which (about 2.5 m (8.2 ft)) is the jejunum.[4]
^Nosek, Thomas M. "Section 6/6ch2/s6ch2_30". Essentials of Human Physiology. Archived from the original on 2016-03-24.
^OED 2nd edition, 1989.
^Entry "jejunum" in Merriam-Webster Online Dictionary.
^ abDrake, Richard L.; Vogl, Wayne; Tibbitts, Adam W. M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students. Philadelphia: Elsevier/Churchill Livingstone. pp. 273–275. ISBN 978-0-8089-2306-0.
^Deakin, Barbara Young; et al. (2006). Wheater's functional histology : a text and colour atlas (5th ed.). Churchill Livingstone/Elsevier. p. 263. ISBN 978-0-443-068-508.
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...
products of digestion that were not absorbed by the jejunum. The ileum follows the duodenum and jejunum and is separated from the cecum by the ileocecal...
diameter. The small intestine has three distinct regions – the duodenum, jejunum, and ileum. The duodenum, the shortest, is where preparation for absorption...
duodenum are as follows (starting at the stomach, and moving toward the jejunum): bulb, descending, horizontal, and ascending. The suspensory muscle attaches...
may be the principal site for iron absorption. The duodenum precedes the jejunum and ileum and is the shortest part of the small intestine. In humans, the...
Treitz) is a thin muscle connecting the junction between the duodenum and jejunum (the small intestine's first and second parts, respectively), as well as...
known as the angle of Treitz, is the border between the duodenum and the jejunum. The ascending portion of the duodenum ascends on the left side of the...
head of the pancreas also necessitates removal of the duodenum, proximal jejunum, gallbladder, and, occasionally, part of the stomach. The most common technique...
horizontal and ascending portions of the duodenum and upper half of the jejunum, they are large and numerous. From this point, down to the middle of the...
part of the small intestine. It is located between the stomach and the jejunum. After foods combine with stomach acid, they descend into the duodenum...
lower GI tract. The digestive tract continues as the jejunum which continues as the ileum. The jejunum, the midsection of the small intestine contains circular...
previous closure of the stomach) is then connected to the first part of the jejunum in end-to-side anastomosis. The Billroth II always follows resection of...
still 50 times more likely. Approximately 50% of cases are found in the jejunum, followed by the ileum in 31% of cases. Almost one half of all lesions...
vein (SMV) is a blood vessel that drains blood from the small intestine (jejunum and ileum). Behind the neck of the pancreas, the superior mesenteric vein...
(stoma) through the skin at the front of the abdomen and the wall of the jejunum (part of the small intestine). It can be performed either endoscopically...
the mucosal lining of the small intestine (mostly in the duodenum and jejunum), called I cells, neurons of the enteric nervous system, and neurons in...
substances. A surgically created passage between the common bile duct and the jejunum in a procedure called a choledochojejunostomy, can be carried out to relieve...
transverse colon and the upper jejunum after a Billroth II surgical procedure. (The Billroth procedure attaches the jejunum to the remainder of the stomach...
jejunum and ileum (the latter two parts of the small intestine). Duodenal cancer has more in common with stomach cancer, while cancer of the jejunum and...
first segment of the small bowel, the duodenum, but the next two, the jejunum and ileum, require other methods. Visualization of the small bowel has...
bicarbonate, which then raises pH of the chyme to 7. The chyme moves through the jejunum and the ileum, where digestion progresses, and the non-useful portion continues...
in the mucosa of the upper gastrointestinal tract's duodenum and upper jejunum while GLP1 is produced and secreted into the blood by L cells located in...
abdomen consists of the lower esophagus, the stomach, the duodenum, the jejunum, ileum, the cecum and the appendix, the ascending, transverse and descending...
It involves a side-to-side anastomosis of the pancreatic duct and the jejunum. The operation involves creating a longitudinal incision along the pancreas...
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