Anal columns

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Anal columns
Coronal section of rectum and anal canal.
The interior of the anal cami and lower part of the rectum, showing the columns of Morgagni and the anal valves between their lower ends. The columns were more numerous in the specimen than usual.
Latin columnae anales
Gray's subject #249 1185
Dorlands/Elsevier c_48/12251084

The lumen of the anal canal presents, in its upper half, a number of vertical folds, produced by an infolding of the mucous membrane and some of the muscular tissue. They are known as the anal columns (or rectal columns [Morgagni]).

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 As such, some of the information contained herein may be outdated.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.

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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)

Junction: Vermiform appendix • Ileocecal valve

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

Anal canal: anal valves • anal sinuses • anal columns • Hilton's white line

Anus: Sphincter ani internus muscle • Sphincter ani externus muscle
Lower GI: lymph GALT: Peyer's patches (M cells)
Retrieved from "http://en.wikipedia.org/wiki/Anal_columns"
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