Colon Histology 2009 - Revision history

S8600021: /* Introduction */

2011-09-27T21:29:42Z

Introduction

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	:'''Current 2011 Page:''' [[Gastrointestinal Tract - Colon Histology]]		:'''Current 2011 Page:''' [[Gastrointestinal Tract - Colon Histology]]


	=== Colon Function ===		=== Colon Function ===

S8600021: /* Introduction */

2011-09-27T21:29:28Z

Introduction

← Older revision		Revision as of 08:29, 28 September 2011
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	'''Current 2011 Page:''' [[Gastrointestinal Tract - Colon Histology]]
			:'''Current 2011 Page:''' [[Gastrointestinal Tract - Colon Histology]]

	=== Colon Function ===		=== Colon Function ===

S8600021 at 20:51, 29 August 2011

2011-08-29T20:51:44Z

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	[[File:AEsmall.jpg\|left]]		[[File:AEsmall.jpg\|left]]
	This practical class will initially provide an overview of the microanatomy of the normal colon, and discuss the functional significance of the various histological structures. The second part, and majority of the class time, will study of the histopathology of colonic neoplasms. This current page only covers the normal colon histology.		This practical class will initially provide an overview of the microanatomy of the normal colon, and discuss the functional significance of the various histological structures. The second part, and majority of the class time, will study of the histopathology of colonic neoplasms. This current page only covers the normal colon histology.


			'''Current 2011 Page:''' [[Gastrointestinal Tract - Colon Histology]]

	=== Colon Function ===		=== Colon Function ===

S8600021: /* Terms */

2010-04-14T12:17:42Z

Terms

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	==Terms==		==Terms==

	'''adipocytes'''		'''adipocytes''' - fat cells.
	:fat cells.

	'''adventitia'''		'''adventitia''' - (tunica adventitia) outermost connective tissue layer covering the gastrointestinal tract of the ascending colon, descending colon and the rectum (retroperitoneal structures are covered in adventitia, peritoneal structures are covered in serosa). The transverse colon is peritoneal and therefore covered in a serosa.
	:(tunica adventitia) outermost connective tissue layer covering the gastrointestinal tract of the ascending colon, descending colon and the rectum (retroperitoneal structures are covered in adventitia, peritoneal structures are covered in serosa). The transverse colon is peritoneal and therefore covered in a serosa.

	'''Auerbach's plexus'''		'''Auerbach's plexus''' - (myenteric plexus) part of the enteric nervous system lying between outer longitudinal and inner circular layers of the muscularis externa. Embryologically formed from neural crest cells.
	:(myenteric plexus) part of the enteric nervous system lying between outer longitudinal and inner circular layers of the muscularis externa. Embryologically formed from neural crest cells.

	'''appendices epiploicae'''		'''appendices epiploicae''' - small pouches in adventitia filled with fatty tissue.
	:small pouches in adventitia filled with fatty tissue.

	'''cecum'''		'''cecum''' - blind pouch portion of gastrointestinal tract that forms the beginning of the large intestine.
	:blind pouch portion of gastrointestinal tract that forms the beginning of the large intestine.

	'''contraction'''		'''contraction''' - colon has two forms of muscular contraction: segmented (local) and peristaltic (movement of contents).
	:colon has two forms of muscular contraction: segmented (local) and peristaltic (movement of contents).

	'''Crypts of Lieberkühn'''		'''Crypts of Lieberkühn''' - (intestinal gland, intestinal crypt) named after Johann Nathanael Lieberkühn a historic German anatomist.
	:(intestinal gland, intestinal crypt) named after Johann Nathanael Lieberkühn a historic German anatomist.

	'''external anal sphincter muscle'''		'''external anal sphincter muscle''' - thick region of circular skeletal muscle located at ano-rectal junction under the skin.
	:thick region of circular skeletal muscle located at ano-rectal junction under the skin.

	'''FAP'''		'''FAP''' - (familial adenomatous polyposis)
	:(familial adenomatous polyposis)

	'''goblet cells'''		'''goblet cells''' - simple columnar epithelial cells that secrete mucus, named by the cell's goblet-like shape.
	:simple columnar epithelial cells that secrete mucus, named by the cell's goblet-like shape.

	'''haustra'''		'''haustra''' - small pouches generated by sacculation, due mainly to taenia coli shorter length.
	:small pouches generated by sacculation, due mainly to taenia coli shorter length.

	'''HNPCC'''		'''HNPCC''' - (hereditary nonpolyposis colorectal cancer)
	:(hereditary nonpolyposis colorectal cancer)

	'''internal anal sphincter muscle'''		'''internal anal sphincter muscle''' - thickened region of muscularis externa circular smooth muscle located at ano-rectal junction.
	:thickened region of muscularis externa circular smooth muscle located at ano-rectal junction.

	'''intestinal gland'''		'''intestinal gland''' - (Crypts of Lieberkühn, intestinal crypt)
	:(Crypts of Lieberkühn, intestinal crypt)

	'''lamina propria'''		'''lamina propria''' - (lamina propria mucosae) the layer of loose connective tissue beneath the gastrointestinal tract epithelium and with the epithelium form the mucosa.
	:(lamina propria mucosae) the layer of loose connective tissue beneath the gastrointestinal tract epithelium and with the epithelium form the mucosa.

	'''lymphatic nodules'''		'''lymphatic nodules''' - most abundant in the cecum and vermiform appendix, but also irregularly scattered over the rest of the colon.
	:most abundant in the cecum and vermiform appendix, but also irregularly scattered over the rest of the colon.

	'''Meissner's plexus'''		'''Meissner's plexus''' - (submucosal plexus) part of the enteric nervous system lying in the submucosa layer. Embryologically formed from neural crest cells.
	:(submucosal plexus) part of the enteric nervous system lying in the submucosa layer. Embryologically formed from neural crest cells.

	'''mucosa'''		'''mucosa''' - the gastrointestinal tract epithelial layer, lamina propria and muscularis mucosa together form the mucosa.
	:the gastrointestinal tract epithelial layer, lamina propria and muscularis mucosa together form the mucosa.

	'''muscularis externa'''		'''muscularis externa''' - gastrointestinal tract outer smooth muscle layer formed generally by an inner circular and an outer longitudinal layer, in the colon the outer layer form the taenia coli.
	:gastrointestinal tract outer smooth muscle layer formed generally by an inner circular and an outer longitudinal layer, in the colon the outer layer form the taenia coli.

	'''muscularis mucosa'''		'''muscularis mucosa''' - thin layer of smooth muscle outside the lamina propria and separating it from the submucosa of the gastrointestinal tract, this layer ends at the recto-anal junction.
	:thin layer of smooth muscle outside the lamina propria and separating it from the submucosa of the gastrointestinal tract, this layer ends at the recto-anal junction.

	'''myenteric plexus'''		'''myenteric plexus''' - (Auerbach's plexus) enteric nervous system lying between outer longitudinal and inner circular layers of the muscularis externa. Embryologically formed from neural crest cells.
	:(Auerbach's plexus) enteric nervous system lying between outer longitudinal and inner circular layers of the muscularis externa. Embryologically formed from neural crest cells.

	'''retroperitoneal'''		'''retroperitoneal''' - (extraperitoneum) the anatomical space in the abdominal cavity behind (retro) the peritoneum space, used to describe structures, organs and tissues located in this region.
	:(extraperitoneum) the anatomical space in the abdominal cavity behind (retro) the peritoneum space, used to describe structures, organs and tissues located in this region.

	'''sacculation'''		'''sacculation''' - process of pouch formation, the colon pursed out to form little pouches.
	:process of pouch formation, the colon pursed out to form little pouches.

	'''serosa'''		'''serosa''' - outermost connective tissue layer covering the gastrointestinal tract in regions where it passes through body cavities.
	: outermost connective tissue layer covering the gastrointestinal tract in regions where it passes through body cavities.

	'''submucosa'''		'''submucosa''' - dense irregular connective tissue that supports the mucosa.
	:dense irregular connective tissue that supports the mucosa.

	'''submucosal plexus'''		'''submucosal plexus''' - (Meissner's plexus) part of the enteric nervous system lying in the submucosa layer. Embryologically formed from neural crest cells.
	:(Meissner's plexus) part of the enteric nervous system lying in the submucosa layer. Embryologically formed from neural crest cells.

	'''taenia coli'''		'''taenia coli''' - three longitudinal smooth muscle bands around the gastrointestinal tract.
	:three longitudinal smooth muscle bands around the gastrointestinal tract.

	'''vermiform'''		'''vermiform''' - (Latin, ''vermis'' = "a worm", and ''forma'' = "shape") having a worm-like shape, as in the appendix (vermiform appendix).
	:(Latin, ''vermis'' = "a worm", and ''forma'' = "shape") having a worm-like shape, as in the appendix (vermiform appendix).

	{{Template:Footer}}		{{Template:Footer}}

	[[Category:Histology]] [[Category:Gastrointestinal Tract]] [[Category:Medicine]]		[[Category:Histology]] [[Category:Gastrointestinal Tract]] [[Category:Medicine]]

S8600021 at 12:14, 14 April 2010

2010-04-14T12:14:55Z

← Older revision		Revision as of 23:14, 14 April 2010
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	{{Template:Footer}}		{{Template:Footer}}

	[[Category:Histology]] [[Category:Gastrointestinal Tract]]		[[Category:Histology]] [[Category:Gastrointestinal Tract]] [[Category:Medicine]]

S8600021 at 12:14, 14 April 2010

2010-04-14T12:14:27Z

← Older revision		Revision as of 23:14, 14 April 2010
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	==Introduction==		==Introduction==
			[[File:AEsmall.jpg\|left]]
	This practical class will initially provide an overview of the microanatomy of the normal colon, and discuss the functional significance of the various histological structures. The second part, and majority of the class time, will study of the histopathology of colonic neoplasms. This current page only covers the normal colon histology.		This practical class will initially provide an overview of the microanatomy of the normal colon, and discuss the functional significance of the various histological structures. The second part, and majority of the class time, will study of the histopathology of colonic neoplasms. This current page only covers the normal colon histology.

S8600021 at 21:15, 6 November 2009

2009-11-06T21:15:32Z

← Older revision		Revision as of 08:15, 7 November 2009
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	'''vermiform'''		'''vermiform'''
	:(Latin, ''vermis'' = "a worm", and ''forma'' = "shape") having a worm-like shape, as in the appendix (vermiform appendix).		:(Latin, ''vermis'' = "a worm", and ''forma'' = "shape") having a worm-like shape, as in the appendix (vermiform appendix).

			{{Template:Footer}}

			[[Category:Histology]] [[Category:Gastrointestinal Tract]]

S8600021: /* Large Intestine Structure */

2009-11-06T21:02:53Z

Large Intestine Structure

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	'''Note:''' This current page contains both additional information and images to the Medicine practical class set and ~~are~~ provided for educational information and study purposes only.		'''Note:''' This current page contains both additional information and images to the Medicine practical class set and is provided for educational information and study purposes only.

	==Objectives==		==Objectives==

S8600021: /* Terms */

2009-11-02T03:14:04Z

Terms

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	'''cecum'''		'''cecum'''
	:blind pouch portion of gastrointestinal tract that forms the beginning of the large intestine.		:blind pouch portion of gastrointestinal tract that forms the beginning of the large intestine.

			'''contraction'''
			:colon has two forms of muscular contraction: segmented (local) and peristaltic (movement of contents).

	'''Crypts of Lieberkühn'''		'''Crypts of Lieberkühn'''

S8600021 at 02:15, 2 November 2009

2009-11-02T02:15:26Z

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	* Secretion of mucus that acts as a lubricant during the transport of the intestinal contents.		* Secretion of mucus that acts as a lubricant during the transport of the intestinal contents.

	=== ~~Colon~~ Structure ===		=== Large Intestine Structure ===
	[[File:Gray1223.png\|thumb\|large intestine anatomy]]		[[File:Gray1223.png\|thumb\|large intestine anatomy]]
	[[File:Gray1126.png\|thumb\|retroperitoneal]]		[[File:Gray1126.png\|thumb\|retroperitoneal]]
	* anatomically four parts - ascending, transverse, descending, and sigmoid.		* large intestine - cecum (+appendix), colon, rectum (+anal canal)
			* colon anatomically four parts - ascending, transverse, descending, and sigmoid.
	* layers from lumen outward - mucosa, submucosa, nuscularis externa, adventitia/serosa		* layers from lumen outward - mucosa, submucosa, nuscularis externa, adventitia/serosa