Difference between revisions of "Crop - Anatomy and Physiology"
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| − | + | {{toplink | |
| − | + | |backcolour =BCED91 | |
| + | |linkpage =Alimentary - Anatomy & Physiology | ||
| + | |linktext =Alimentary System | ||
| + | |maplink = | ||
| + | |pagetype =Anatomy | ||
| + | |sublink1=Avian Digestive Tract - Anatomy & Physiology | ||
| + | |subtext1=AVIAN DIGESTIVE TRACT | ||
| + | }} | ||
| + | <br> | ||
==Introduction== | ==Introduction== | ||
| − | The crop is a food storage device present in avian species. It is usually used when the muscular stomach ([[Gizzard - | + | The crop is a food storage device present in avian species. It is usually used when the muscular stomach ([[The Gizzard - Anamtomy & Physiology|gizzard]]) is full. The crop also softens food. |
| − | It is a useful tool for avian veterinarians and owners for assessing | + | It is a useful tool for avian veterinarians and owners for 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. |
==Structure and Function== | ==Structure and Function== | ||
| − | [[Image:Crop of fowl.JPG|thumb|right| | + | [[Image:Crop of fowl.JPG|thumb|right|150px|Crop of fowl(Copyright RVC)]] |
| + | |||
| + | *Muscular chamber | ||
| + | |||
| + | *Fusiform enlargement of the [[Oesophagus - Anatomy & Physiology|oesophagus]] | ||
| + | |||
| + | *Thoracic inlet of ventral wall of [[Oesophagus - Anatomy & Physiology|oesophagus]] | ||
| − | + | *Bulges and lies against the breast muscles | |
==Innervation== | ==Innervation== | ||
| − | + | *Vagus nerve ([[Cranial Nerves - Anatomy & Physiology|CN X]]) | |
==Species Differences== | ==Species Differences== | ||
| − | + | *Crop small in ducks and geese | |
| − | + | *Crop much larger and muscular in seed eating birds | |
| − | + | *Pigeons have epithelial cells in their crop sensitive to prolactin which slough when chicks (squabs) hatch producing crop milk | |
| + | *Owls have no storage facility in their crops, so produce a pellet of indigestible material after every meal | ||
| − | + | ==Links== | |
| − | |||
| − | |||
| − | + | [[The Avian Alimentary Tract - Anatomy & Physiology - Flashcards|Avian Alimentary Tract Flashcards]] | |
| − | |||
| − | [[ | + | [[Oesophagus - Anatomy & Physiology]] |
| − | |||
Revision as of 16:01, 5 July 2010
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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 a useful tool for avian veterinarians and owners for 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.
Structure and Function
- Muscular chamber
- Fusiform enlargement of the oesophagus
- Thoracic inlet of ventral wall of oesophagus
- Bulges and lies against the breast muscles
Innervation
- Vagus nerve (CN X)
Species Differences
- Crop small in ducks and geese
- Crop much larger and muscular in seed eating birds
- Pigeons have epithelial cells in their crop sensitive to prolactin which slough when chicks (squabs) hatch producing crop milk
- Owls have no storage facility in their crops, so produce a pellet of indigestible material after every meal