| 1: Ascending colon|
2: Transverse colon
3: Descending colon
4: Sigmoid colon
|Front of abdomen, showing surface markings for liver, stomach, and great intestine.|
|Gray's||subject #249 1180|
|Artery||Middle colic artery|
|Vein||Middle colic vein|
|Precursor||Midgut (first 2/3) Hindgut (last 1/3)|
The transverse colon the longest and most movable part of the colon, passes with a downward convexity from the right hypochondrium region across the abdomen, opposite the confines of the epigastric and umbilical zones, into the left hypochondrium region, where it curves sharply on itself beneath the lower end of the spleen, forming the splenic or left colic flexure. The right colic flexure is adjacent to the liver.
In its course, it describes an arch, the concavity of which is directed backward and a little upward; toward its splenic end there is often an abrupt U-shaped curve which may descend lower than the main curve.
It is in relation, by its upper surface, with the liver and gall-bladder, the greater curvature of the stomach, and the lower end of the spleen; by its under surface, with the small intestine; by its anterior surface, with the anterior layers of the greater omentum and the abdominal parietes; its posterior surface is in relation from right to left with the descending portion of the duodenum, the head of the pancreas, and some of the convolutions of the jejunum and ileum.
- Digestive system diagram.svg
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Anatomy of torso, digestive system: Gastrointestinal tract
|Upper GI: to stomach||Mouth • Pharynx (nasopharynx, oropharynx, hypopharynx) • Esophagus • Crop|
|Upper GI: stomach||rugae - gastric pits - cardia/gland - fundus/gland - pylorus/gland - pyloric antrum - pyloric canal - greater curvature - lesser curvature - angular incisure|
|Lower GI: intestines||Small intestine: Duodenum (Suspensory muscle, Major duodenal papilla, Minor duodenal papilla) • Duodenojejunal flexure • Jejunum • Ileum • continuous (intestinal villus, crypts of Lieberkühn, circular folds) Large intestine: Cecum • Colon (ascending colon, hepatic flexure, transverse colon, splenic flexure, descending colon, sigmoid colon) • continuous (taenia coli, haustra, epiploic appendix)|
|Lower GI: termination||Rectum: Houston valve • rectal ampulla • pectinate line Anus: Sphincter ani internus muscle • Sphincter ani externus muscle|
|Lower GI: lymph||GALT: Peyer's patches (M cells)|
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