Difference between revisions of "Crop - Anatomy and Physiology"

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<big><center>[[Oesophagus - Anatomy & Physiology|'''BACK TO OESOPHAGUS''']]</center></big>
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Also known as: '''''Ingluvies'''''
 
  
 
==Introduction==
 
==Introduction==
  
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The crop is a food storage device present in avian species. It is usually used when the muscular stomach ([[Gizzard - Anatomy & Physiology|gizzard]]) is full. The crop also softens food.
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The crop is a food storage device present in avian species. It is usually used when the muscular stomach (gizzard) is full. The crop also softens food.
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It is a useful tool for avian veterinarians and owners for assessing if a bird has recently eaten and it is especially important to ensure young chicks always have full crops. It is also a common site for impactions, rupture and surgical entry to remove foreign bodies.
 
  
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==Structure and Function==
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It is useful tool for avian veterinarians and owners of assessing when the bird last ate and it is especially important to ensure young chicks always have full crops. It is also a common site for impactions and surgical entry to remove foreign bodies.  
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[[Image:Crop of fowl.JPG|thumb|right|250px|Crop of fowl(Copyright RVC)]]
 
  
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The crop is a muscular chamber. It is a fusiform enlargement of the ventral wall of the [[Oesophagus - Anatomy & Physiology|oesophagus]] at the thoracic inlet. It bulges and lies against the breast muscles.
 
  
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==Innervation==
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==Functional Anatomy==
  
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The crop is innervated by the '''vagus nerve''' ([[Cranial Nerves - Anatomy & Physiology|CN X]]).
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*Muscular chamber
  
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==Species Differences==
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*Fusiform enlargement of the [[Oesophagus - Anatomy & Physiology|oesophagus]]
  
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The crop is absent or vestigial in '''waterfowl''' (ducks, swans and geese) and '''owls''' and tends to be much larger and muscular in '''seed eating birds''' and '''carnivorous birds of prey'''. '''Pigeons''' have epithelial cells in their crop sensitive to prolactin which slough when chicks (squabs) hatch, producing crop milk.
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*Thoracic inlet of ventral wall of [[Oesophagus - Anatomy & Physiology|oesophagus]]
  
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==Links==
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*Bulges and lies against the breast muscles
  
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'''Click here for more information on the [[Oesophagus - Anatomy & Physiology]]'''
 
  
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==Species Differences==
  
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{{Template:Learning
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*Crop small in ducks and geese
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|flashcards = [[The Avian Alimentary Tract - Anatomy & Physiology - Flashcards|Avian Alimentary Tract]]
 
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}}
 
  
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==Webinars==
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*Crop much larger and muscular in seed eating birds
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<rss max="10" highlight="none">https://www.thewebinarvet.com/gastroenterology-and-nutrition/webinars/feed</rss>
 
  
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[[Category:Avian Alimentary System - Anatomy & Physiology]]
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*Crop milk produced by pigeons for their squabs
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[[Category:A&P Done]]
 

Revision as of 12:12, 2 July 2008

BACK TO OESOPHAGUS

Introduction

The crop is a food storage device present in avian species. It is usually used when the muscular stomach (gizzard) is full. The crop also softens food.

It is useful tool for avian veterinarians and owners of assessing when the bird last ate and it is especially important to ensure young chicks always have full crops. It is also a common site for impactions and surgical entry to remove foreign bodies.


Functional Anatomy

  • Muscular chamber
  • Bulges and lies against the breast muscles


Species Differences

  • Crop small in ducks and geese
  • Crop much larger and muscular in seed eating birds
  • Crop milk produced by pigeons for their squabs
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