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

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<big><center>[[Liver - Anatomy & Physiology|'''BACK TO THE LIVER''']]</center></big>
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==Introduction==
 
==Introduction==
  
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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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==Structure==
  
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==Structure==
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[[Image:Canine Gallbladder Anatomy.jpg|thumb|right|150px|Location of the Canine Gallbladder - Copyright RVC 2008]]
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*Lies between the right medial and quadrate lobes of the [[Liver - Anatomy & Physiology|liver]]
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*Partly attached
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*Partly free
  
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[[Image:Canine Gallbladder Anatomy.jpg|thumb|right|250px|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.
 
  
 
==Function==
 
==Function==
  
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The gall bladder stores bile and concentrates bile by absorption through the folded mucosal wall.
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*Stores bile
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*Concentrates bile by absorption through the folded mucosal wall
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==Innervation==
 
==Innervation==
  
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The gall bladder is innervated by parasympathetic nerves.
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*Parasympathetic nerves
  
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==Species Differences==
 
  
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'''Equine'''
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==Histology==
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Equine species have no gallbladder.
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[[Image:Guinea-pig Gallbladder Hsitology.jpg|thumb|right|150px|Histology of the Guinea-pig Gallbladder - Copyright RVC 2008]]
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*Highly folded mucosa
  
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'''Rodents'''
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*Reduced submucosa
  
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There is no gallbladder in rats.
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*No lamina muscularis
  
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'''Canine'''
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*Simple columnar epithelium
  
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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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*No glands
  
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'''Bovine'''
 
  
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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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==Species Differences==
  
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'''[[Avian Digestive Tract - Anatomy & Physiology|Avian]]'''
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'''Equine'''
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*The horse has no gallbladder
  
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'''Pigeons''' and '''parrots''' lack a gallbladder.
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'''Canine'''
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*In some dogs, the gallbladder is so deeply embedded it makes contact with the diaphragm and contacts the parietal surface
  
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==Histology==
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'''Rodents'''
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*Rats do not have a gallbladder
  
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[[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 - gall bladder|Pathology of the Gall Bladder]]
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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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<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 14:37, 10 July 2008

BACK TO THE LIVER

Introduction

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

  • The horse has no gallbladder

Canine

  • In some dogs, the gallbladder is so deeply embedded it makes contact with the diaphragm and contacts the parietal surface

Rodents

  • Rats do not have a gallbladder


Links

Pathology of the Gall Bladder

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