Image of the gastrointestinal tract, with the duodenum highlighted.
Diagram of the human duodenum with major parts labelled
Details
Pronunciation
/ˌdjuːəˈdiːnəm/, US also /djuˈɒdɪnəm/[2]
Precursor
Foregut (1st and 2nd parts), midgut (3rd and 4th part)
Part of
Small intestine
System
Digestive system
Artery
Inferior pancreaticoduodenal artery, superior pancreaticoduodenal artery
Vein
Pancreaticoduodenal veins
Nerve
Celiac ganglia, vagus[1]
Identifiers
MeSH
D004386
TA98
A05.6.02.001
TA2
2944
FMA
7206
Anatomical terminology
[edit on Wikidata]
Major parts of the
Gastrointestinal tract
Upper gastrointestinal tract
Mouth
Pharynx
Esophagus
Stomach
Duodenum
Lower gastrointestinal tract
Small intestine
Jejunum
Ileum
Large intestine
Cecum
Appendix
Ascending colon
Transverse colon
Descending colon
Sigmoid colon
Rectum
Anus
See also
Gastrointestinal wall
Human digestive system
Anatomical terminology
Outline of anatomy
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The duodenum is the first section of the small intestine[3] in most higher vertebrates, including mammals, reptiles, and birds. In mammals it 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 duodenum is a hollow jointed tube about 25–38 centimetres (10–15 inches) long connecting the stomach to the middle part of the small intestine.[4][5] It begins with the duodenal bulb and ends at the suspensory muscle of duodenum.[6] Duodenum can be divided into four parts: the first (superior), the second (descending), the third (transverse) and the fourth (ascending) parts.[5]
^Nosek, Thomas M. "Section 6/6ch2/s6ch2_30". Essentials of Human Physiology. Archived from the original on 2016-03-24.
^Jones, Daniel (2011). Roach, Peter; Setter, Jane; Esling, John (eds.). Cambridge English Pronouncing Dictionary (18th ed.). Cambridge University Press. ISBN 978-0-521-15255-6.
^"NCI Dictionary of Cancer Terms". National Cancer Institute. Retrieved 2022-06-07. The first part of the small intestine. It connects to the stomach. The duodenum helps to further digest food coming from the stomach. It absorbs nutrients (vitamins, minerals, carbohydrates, fats, proteins) and water from food so they can be used by the body.
^"Duodenum: MedlinePlus Medical Encyclopedia". MedlinePlus. Retrieved 2022-06-07. It is located between the stomach and the middle part of the small intestine. After foods mix with stomach acid, they move into the duodenum, where they mix with bile from the gallbladder and digestive juices from the pancreas.
^ abNolan, D. J. (2002). "Radiology of the Duodenum". Radiological Imaging of the Small Intestine. Medical Radiology. Berlin, Heidelberg: Springer Berlin Heidelberg. pp. 247–259. doi:10.1007/978-3-642-56231-0_6. ISBN 978-3-642-62993-8. ISSN 0942-5373. duodenum is a C-shaped hollow organ forming an incomplete circle around the head of the pancreas. ...it is normally examined as part of the upper gastrointestinal tract.
^van Gijn J; Gijselhart JP (2011). "Treitz and his ligament". Ned. Tijdschr. Geneeskd. 155 (8): A2879. PMID 21557825.
The duodenum is the first section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In mammals it may be the principal...
Duodenal cancer is a cancer in the first section of the small intestine known as the duodenum. Cancer of the duodenum is relatively rare compared to stomach...
The duodenal bulb (also ampulla of duodenum, duodenal ampulla, or duodenal cap) is the initial, dilated portion of (the superior part of) the duodenum just...
The duodenal switch (DS) procedure, gastric reduction duodenal switch (GRDS), is a weight loss surgery procedure that is composed of a restrictive and...
The suspensory muscle of duodenum (also known as suspensory ligament of duodenum, Treitz's muscle or ligament of Treitz) is a thin muscle connecting the...
The major duodenal papilla (papilla of Vater) is a rounded projection in the duodenum into which the common bile duct and pancreatic duct drain. The major...
pancreatic juice into the duodenum through the pancreatic duct. This juice contains bicarbonate, which neutralizes acid entering the duodenum from the stomach;...
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...
The small intestine has three distinct regions – the duodenum, jejunum, and ileum. The duodenum, the shortest, is where preparation for absorption through...
Duodenal lymphocytosis, sometimes called lymphocytic duodenitis, lymphocytic duodenosis, or duodenal intraepithelial lymphocytosis, is a condition where...
Duodenal atresia is the congenital absence or complete closure of a portion of the lumen of the duodenum. It causes increased levels of amniotic fluid...
/pɪˈloʊrəs/) pyloric region or pyloric part connects the stomach to the duodenum. The pylorus is considered as having two parts, the pyloric antrum (opening...
it passes into the duodenum, the first part of the small intestine. The third stage, the intestinal phase, begins in the duodenum. Here, the partially...
down chemically by digestive enzymes in the mouth, stomach, pancreas, and duodenum, before being able to be absorbed into the bloodstream. Initial breakdown...
the passage of partially digested food (chyme) from the stomach into the duodenum, the first and shortest part of the small intestine, where peristalsis...
person's or another animal's stomach, through the pyloric valve, into the duodenum (the beginning of the small intestine). Chyme results from the mechanical...
esophagus, stomach, and duodenum. The exact demarcation between the upper and lower tracts is the suspensory muscle of the duodenum. This differentiates...
the duodenum. This common duct usually features a dilation ("ampulla"). The common duct then opens medially into the descending part of the duodenum at...
head of the pancreas. It is also used for the treatment of pancreatic or duodenal trauma, or chronic pancreatitis. Due to the shared blood supply of organs...
portion of the duodenum. In healthy individuals, the CBD meets the pancreatic duct at the ampulla of Vater, which drains via the major duodenal papilla to...
hormones secretin and cholecystokinin, which are produced by the walls of the duodenum, and by the action of autonomic innervation. The release of these hormones...
Duodenal papilla may refer to: Major duodenal papilla Minor duodenal papilla This disambiguation page lists articles associated with the title Duodenal...
stage in which the duodenum responds to arriving chyme and moderates gastric activity through hormones and nervous reflexes. The duodenum initially enhances...
bicarbonate and secretes bicarbonate through the pancreatic duct to the duodenum to neutralize gastric acid passing into the digestive tract. The secretion...
concentrates the bile produced by the liver, which is later excreted to the duodenum to help with digestion. The liver's highly specialized tissue, consisting...
pyloric sphincter valve opens, partially digested food (chyme) enters the duodenum where it mixes with digestive enzymes from the pancreas and bile juice...
of the duodenum by regulating secretions in the stomach, pancreas, and liver. It is a peptide hormone produced in the S cells of the duodenum, which are...
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