Difference between revisions of "Proventriculus - Anatomy & Physiology"
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The proventriculus is a storage organ in fish and flesh eating birds. It is appropriate to a soft diet and secretes digestive enzymes. It contacts the left lobe of the [[Avian Liver - Anatomy & Physiology|liver]] ventrally and laterally. It is related dorso-caudally to the [[Spleen - Anatomy & Physiology|spleen]]. It is more cranial than the [[Gizzard - Anatomy & Physiology|gizzard]] and lies to the left of the midline of the bird. It is spindle/fusiform shaped and is roughly 4cm long. The lumen diameter is similar to the [[Oesophagus - Anatomy & Physiology|oesophagus]]. There is no oesophageal sphincter. | The proventriculus is a storage organ in fish and flesh eating birds. It is appropriate to a soft diet and secretes digestive enzymes. It contacts the left lobe of the [[Avian Liver - Anatomy & Physiology|liver]] ventrally and laterally. It is related dorso-caudally to the [[Spleen - Anatomy & Physiology|spleen]]. It is more cranial than the [[Gizzard - Anatomy & Physiology|gizzard]] and lies to the left of the midline of the bird. It is spindle/fusiform shaped and is roughly 4cm long. The lumen diameter is similar to the [[Oesophagus - Anatomy & Physiology|oesophagus]]. There is no oesophageal sphincter. | ||
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| + | ==Histology== | ||
| + | |||
| + | [[Image:Proventriculus Histology.jpg|thumb|right|150px|Proventriculus Histology - Dr. Thomas Caceci and Dr. Ihab El-Zhogby, Department of Histology, Faculty of Veterinary Medicine, Zagazig University, Egypt]] | ||
| + | *Mucous cells | ||
| + | |||
| + | *Columnar epithelium | ||
| + | |||
| + | *Basophilic | ||
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| + | *Papillae- through which collecting ducts from glands run | ||
| + | |||
| + | *Lamina propria run into the papillae | ||
| + | |||
| + | *Hydrochloric acid and pepsin produced | ||
| + | |||
| + | *Glands in the submucosa | ||
| + | |||
| + | *Single tubular glands are grouped into lobules with a common opening into a papillae | ||
| + | |||
| + | *Serous membrane of mesothelial cells attached to the outer longitudinal layer of muscle | ||
| + | |||
| + | *3 layers of lamina muscularis | ||
| + | |||
| + | *No parietal cells | ||
==Links== | ==Links== | ||
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'''Test yourself with the [[The Avian Alimentary Tract - Anatomy & Physiology - Flashcards|Avian Alimentary Tract Flashcards]]''' | '''Test yourself with the [[The Avian Alimentary Tract - Anatomy & Physiology - Flashcards|Avian Alimentary Tract Flashcards]]''' | ||
Revision as of 18:21, 10 December 2010
Introduction
The proventriculus is also referred to as the glandular stomach. It is connected by the isthmus to the gizzard.
Structure and Function
The proventriculus is a storage organ in fish and flesh eating birds. It is appropriate to a soft diet and secretes digestive enzymes. It contacts the left lobe of the liver ventrally and laterally. It is related dorso-caudally to the spleen. It is more cranial than the gizzard and lies to the left of the midline of the bird. It is spindle/fusiform shaped and is roughly 4cm long. The lumen diameter is similar to the oesophagus. There is no oesophageal sphincter.
Histology
- Mucous cells
- Columnar epithelium
- Basophilic
- Papillae- through which collecting ducts from glands run
- Lamina propria run into the papillae
- Hydrochloric acid and pepsin produced
- Glands in the submucosa
- Single tubular glands are grouped into lobules with a common opening into a papillae
- Serous membrane of mesothelial cells attached to the outer longitudinal layer of muscle
- 3 layers of lamina muscularis
- No parietal cells
Links
Test yourself with the Avian Alimentary Tract Flashcards