Difference between revisions of "Proventriculus - Anatomy & Physiology"
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| + | <big><center>[[Avian Digestive Tract - Anatomy & Physiology|'''BACK TO THE AVIAN DIGESTIVE TRACT - ANATOMY & PHYSIOLOGY''']]</center></big> | ||
| + | |||
==Introduction== | ==Introduction== | ||
| − | The proventriculus is also referred to as the | + | The proventriculus is also referred to as the muscular stomach. It is connected by the isthmus to the [[The Gizzard - Anamtomy & Physiology|gizzard]]. |
| + | |||
==Structure and Function== | ==Structure and Function== | ||
| − | [[Image:Proventriculus Anatomy.jpg|thumb|right| | + | |
| − | + | [[Image:Proventriculus Anatomy.jpg|thumb|right|150px|Proventriculus Anatomy - RVC 2008]] | |
| + | *A storage organ in fish and flesh eating birds | ||
| + | |||
| + | *Appropriate to a soft diet | ||
| + | |||
| + | *Secretes digestive enzymes | ||
| + | |||
| + | *Contacts the left lobe of the liver ventrally and laterally | ||
| + | |||
| + | *Related dorso-caudally to the spleen | ||
| + | |||
| + | *More cranial than the [[The Gizzard - Anamtomy & Physiology|gizzard]] | ||
| + | |||
| + | *Lies to the left of the midline of the bird | ||
| + | |||
| + | *Spindle/fusiform shaped | ||
| + | |||
| + | *Roughly 4cm long | ||
| + | |||
| + | *Lumen diameter similar to the [[Oesophagus - Anatomy & Physiology|oesophagus]] | ||
| + | |||
| + | *No oesophageal sphincter | ||
| + | |||
==Histology== | ==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 | |
| + | |||
| + | *Basolphilic | ||
| + | |||
| + | *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 | |
| − | |||
Revision as of 14:49, 16 July 2008
Introduction
The proventriculus is also referred to as the muscular stomach. It is connected by the isthmus to the gizzard.
Structure and Function
- A storage organ in fish and flesh eating birds
- Appropriate to a soft diet
- Secretes digestive enzymes
- Contacts the left lobe of the liver ventrally and laterally
- Related dorso-caudally to the spleen
- More cranial than the gizzard
- Lies to the left of the midline of the bird
- Spindle/fusiform shaped
- Roughly 4cm long
- Lumen diameter similar to the oesophagus
- No oesophageal sphincter
Histology
- Mucous cells
- Columnar epithelium
- Basolphilic
- 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