Difference between revisions of "Gizzard - Anatomy & Physiology"
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| − | + | <big><center>[[Alimentary - Anatomy & Physiology|'''BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY''']]</center></big> | |
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==Introduction== | ==Introduction== | ||
| − | The gizzard is also referred to as the muscular stomach | + | The gizzard is also referred to as the muscular stomach. It is connected by the isthmus to the [[The Proventriculus - Anatomy & Physiology|proventriculus]] and to the duodenum. |
| − | == | + | ==Functional Anatomy== |
| − | [[Image:Gizzard Anatomy.jpg|thumb|right| | + | [[Image:Gizzard Anatomy.jpg|thumb|right|150px|Gizzard Anatomy - RVC 2008]] |
| − | + | *Mechanical reduction of tougher material through powerful muscular development | |
| + | |||
| + | *Contacts the liver | ||
| + | |||
| + | *Contacts the sternum and lower left abdominal wall | ||
| + | |||
| + | *More caudal than the [[The Proventriculus - Anatomy & Physiology|proventriculus]] | ||
| + | |||
| + | *Roughly on the midline of the bird | ||
| + | |||
| + | *Lens shaped | ||
| + | |||
| + | *Interior elongated by cranial and caudal blind sacs | ||
| + | |||
| + | *Cranial blind sac contacts [[The Proventriculus - Anatomy & Physiology|proventriculus]] | ||
| + | |||
| + | *Pylorus on right surface next to cranial blind sac | ||
| + | |||
| + | *Two thick masses of muscle that insert on tendonous surfaces | ||
| + | |||
| + | *In seed eating birds grit is digested to increase grinding down of food particles | ||
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==Histology== | ==Histology== | ||
| − | |||
| − | |||
| − | + | *Thin, but tough mucous membrane | |
| + | |||
| + | *Cuboidal epithelium | ||
| + | |||
| + | *Tubular glands | ||
| + | |||
| + | *Cuticle of koilin a carbohydrate complex is present due to the solidifying of the glandular secretion. It is replenished as it is worn down. | ||
| + | |||
| + | *Thick keratin layer to protect muscle | ||
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| − | + | ==Species Diffences== | |
| − | + | *No gizzard in falconiformes (raptors etc.) | |
| − | + | *No gizzard in stringiformes (owls etc.) | |
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| − | == | + | ==Other Information== |
| − | |||
| − | + | *Grit should be provided in seed eating birds diet. It is radiodense and marks out where the gizzard is located on radiographs. | |
| − | |||
Revision as of 14:20, 7 July 2008
Introduction
The gizzard is also referred to as the muscular stomach. It is connected by the isthmus to the proventriculus and to the duodenum.
Functional Anatomy
- Mechanical reduction of tougher material through powerful muscular development
- Contacts the liver
- Contacts the sternum and lower left abdominal wall
- More caudal than the proventriculus
- Roughly on the midline of the bird
- Lens shaped
- Interior elongated by cranial and caudal blind sacs
- Cranial blind sac contacts proventriculus
- Pylorus on right surface next to cranial blind sac
- Two thick masses of muscle that insert on tendonous surfaces
- In seed eating birds grit is digested to increase grinding down of food particles
Histology
- Thin, but tough mucous membrane
- Cuboidal epithelium
- Tubular glands
- Cuticle of koilin a carbohydrate complex is present due to the solidifying of the glandular secretion. It is replenished as it is worn down.
- Thick keratin layer to protect muscle
Species Diffences
- No gizzard in falconiformes (raptors etc.)
- No gizzard in stringiformes (owls etc.)
Other Information
- Grit should be provided in seed eating birds diet. It is radiodense and marks out where the gizzard is located on radiographs.