Difference between revisions of "Gall Bladder - Anatomy & Physiology"

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<br>
 
==Introduction==
 
==Introduction==
  
 
The gall bladder stores bile produced in the [[Liver - Anatomy & Physiology|liver]]. Bile is important in the digestion of lipids.
 
The gall bladder stores bile produced in the [[Liver - Anatomy & Physiology|liver]]. Bile is important in the digestion of lipids.
  
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The gall bladder forms as an outgrowth of the bile duct, as a secondary hollow at the posterior edge of the original hepatic rudiment. The '''cystic duct''' joins the common bile duct which enters the [[Duodenum - Anatomy & Physiology|duodenum]] at the major '''duodenal papillae''' (with the pancreatic duct) on the dorsal surface of the [[Duodenum - Anatomy & Physiology|duodenum]].
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The gall bladder forms as an outgrowth of the bile duct, as a secondary hollow at the posterior edge of the original hepatic rudiment. The gall bladder and the cyctic duct joins the common bile duct which enters the [[Duodenum - Anatomy & Physiology|duodenum]] at the major duodenal papillae (with the pancreatic duct) on the dorsal surface of the [[Duodenum - Anatomy & Physiology|duodenum]]
  
 
==Structure==
 
==Structure==
  
−
[[Image:Canine Gallbladder Anatomy.jpg|thumb|right|250px|Location of the Canine Gallbladder - Copyright RVC 2008]]
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[[Image:Canine Gallbladder Anatomy.jpg|thumb|right|150px|Location of the Canine Gallbladder - Copyright RVC 2008]]
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The gall bladder lies between the right medial and quadrate lobes of the [[Liver - Anatomy & Physiology|liver]]. It is partly attached and partly free.
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*Lies between the right medial and quadrate lobes of the [[Liver - Anatomy & Physiology|liver]]
 +
 
 +
*Partly attached
 +
 
 +
*Partly free
 +
 
  
 
==Function==
 
==Function==
  
−
The gall bladder stores bile and concentrates bile by absorption through the folded mucosal wall.
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*Stores bile
 +
 
 +
*Concentrates bile by absorption through the folded mucosal wall
 +
 
  
 
==Innervation==
 
==Innervation==
  
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The gall bladder is innervated by parasympathetic nerves.
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*Parasympathetic nerves
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 +
 
 +
==Histology==
 +
 
 +
[[Image:Guinea-pig Gallbladder Hsitology.jpg|thumb|right|150px|Histology of the Guinea-pig Gallbladder - Copyright RVC 2008]]
 +
*Highly folded mucosa
 +
 
 +
*Reduced submucosa
 +
 
 +
*No lamina muscularis
 +
 
 +
*Simple columnar epithelium
 +
 
 +
*No glands
 +
 
  
 
==Species Differences==
 
==Species Differences==
  
 
'''Equine'''
 
'''Equine'''
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Equine species have no gallbladder.
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*No gallbladder
  
 
'''Rodents'''
 
'''Rodents'''
−
 
+
*No gallbladder in rats
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There is no gallbladder in rats.
 
  
 
'''Canine'''
 
'''Canine'''
 +
*Lies opposite the 8th intercostal space
  
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The gall bladder lies opposite the 8th intercostal space. It has the thinnest layers of tunica muscularis.
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*Thinest layers of tunica muscularis
  
 
'''Bovine'''
 
'''Bovine'''
 +
*Thickest layers of tunica muscularis
  
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The bovine gall bladder has the thickest layers of the tunica muscularis. Sheep have a less projecting gall bladder than cows. The gallbladder lies against the 10th or 11th rib.
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*Sheep have a less projecting gall bladder than cows
 +
 
 +
*Gallbladder lies against the 10th or 11th rib
  
 
'''[[Avian Digestive Tract - Anatomy & Physiology|Avian]]'''
 
'''[[Avian Digestive Tract - Anatomy & Physiology|Avian]]'''
  
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'''Pigeons''' and '''parrots''' lack a gallbladder.
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*Pigeons and parrots lack a gallbladder
−
 
 
−
==Histology==
 
−
 
 
−
[[Image:Guinea-pig Gallbladder Hsitology.jpg|thumb|right|250px|Histology of the Guinea-pig Gallbladder - Copyright RVC 2008]]
 
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The gall bladder has a highly folded '''mucosa'''. It has a reduced '''submucosa''' and no '''lamina muscularis'''. The gall bladder has a simple columnar epithelium and no glands present.
 
  
 
==Links==
 
==Links==
  
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'''Click here for [[:Category:Gall Bladder and Tract - Pathology|pathology of the Gall Bladder]]'''
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[[Liver - Anatomy & Physiology - Flashcards|Liver & Gall Bladder Flashcards]]
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{{Template:Learning
 
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|flashcards = [[Liver - Anatomy & Physiology - Flashcards|Liver & Gall Bladder]]
 
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|powerpoints = [[Gastrointestinal Tract Histology resource|Histology of the gall bladder - see part 2]]
 
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|videos = [[Video: Bovine liver potcast|Bovine liver potcast]]<br>[[Video: Bovine liver potcast 2|Bovine liver potcast 2]]<br>[[Video: Ventral view of the pancreas and small intestine potcast|Ventral view of the pancreas and small intestine potcast]]<br>[[Video: Bovine pregnant uterus potcast 2|Bovine pregnant uterus potcast 2]]<br>[[Video: Ovine right-sided abdominal and thoracic dissection|Ovine right-sided abdominal and thoracic dissection]]
 
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|Vetstream = [https://www.vetstream.com/canis/Content/Freeform/fre60060.asp Gall bladder disease]
 
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}}
 
  
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==Webinars==
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[[Liver - gall bladder|Pathology of the Gall Bladder]]
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<rss max="10" highlight="none">https://www.thewebinarvet.com/gastroenterology-and-nutrition/webinars/feed</rss>
 
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[[Category:Liver and Gall Bladder - Anatomy & Physiology]]
 
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[[Category:A&P Done]]
 

Revision as of 23:24, 2 July 2010

Anatomy and PhysiologyWikiAnt and Phys Banner.png
ALIMENTARY SYSTEM
THE LIVER



Introduction

The gall bladder stores bile produced in the liver. Bile is important in the digestion of lipids.

The gall bladder forms as an outgrowth of the bile duct, as a secondary hollow at the posterior edge of the original hepatic rudiment. The gall bladder and the cyctic duct joins the common bile duct which enters the duodenum at the major duodenal papillae (with the pancreatic duct) on the dorsal surface of the duodenum

Structure

Location of the Canine Gallbladder - Copyright RVC 2008
  • Lies between the right medial and quadrate lobes of the liver
  • Partly attached
  • Partly free


Function

  • Stores bile
  • Concentrates bile by absorption through the folded mucosal wall


Innervation

  • Parasympathetic nerves


Histology

Histology of the Guinea-pig Gallbladder - Copyright RVC 2008
  • Highly folded mucosa
  • Reduced submucosa
  • No lamina muscularis
  • Simple columnar epithelium
  • No glands


Species Differences

Equine

  • No gallbladder

Rodents

  • No gallbladder in rats

Canine

  • Lies opposite the 8th intercostal space
  • Thinest layers of tunica muscularis

Bovine

  • Thickest layers of tunica muscularis
  • Sheep have a less projecting gall bladder than cows
  • Gallbladder lies against the 10th or 11th rib

Avian

  • Pigeons and parrots lack a gallbladder

Links

Liver & Gall Bladder Flashcards

Pathology of the Gall Bladder

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