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Rectum - Anatomy & Physiology (view source)
Revision as of 17:32, 6 January 2011
, 17:32, 6 January 2011no edit summary
==Histology==
==Histology==
[[Image:Recto-Anal Junction.jpg|thumb|right|250px|Recto-Anal Junction © RVC 2008]]
The epithelium of the rectum is '''columnar'''. '''Goblet cells''' are present in the mucosa.
The epithelium of the rectum is '''columnar'''. '''Goblet cells''' are present in the mucosa.
===Recto-Anal Junction===
===Recto-Anal Junction===
The junction marks the termination of the '''lamina muscularis''' and longitudinal layer of the '''tunica muscularis'''. The circular layer of the '''tunica muscularis''' forms the '''internal anal sphincter'''. The '''external anal sphincter''' is formed from skeletal muscle. At the junction, the epithelium changes from columnar to stratified squamous non-keratinised.
The junction marks the termination of the '''lamina muscularis''' and longitudinal layer of the '''tunica muscularis'''. The circular layer of the '''tunica muscularis''' forms the '''internal anal sphincter'''. The '''external anal sphincter''' is formed from skeletal muscle. At the junction, the epithelium changes from columnar to stratified squamous non-keratinised.