Difference between revisions of "Proventriculus - Anatomy & Physiology"
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==Histology== | ==Histology== | ||
| − | [[Image:Proventriculus Histology.jpg|thumb|right| | + | [[Image:Proventriculus Histology.jpg|thumb|right|250px|Proventriculus Histology - Dr. Thomas Caceci and Dr. Ihab El-Zhogby, Department of Histology, Faculty of Veterinary Medicine, Zagazig University, Egypt]] |
| − | + | The proventriculus consists of '''mucous cells'''. It has a '''columnar epithelium''' and the cells are basophilic. There are '''papillae''', through which collecting ducts from glands run. '''Lamina propria''' run into the papillae. Hydrochloric acid and pepsin are produced in the glands in the submucosa. Single tubular glands are grouped into lobules with a common opening into a papillae. There is a serous membrane of '''mesothelial cells''' attached to the outer longitudinal layer of muscle. The proventriculus has 3 layers of '''lamina muscularis''' and no parietal cells. | |
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==Links== | ==Links== | ||
Revision as of 22:01, 17 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
The proventriculus consists of mucous cells. It has a columnar epithelium and the cells are basophilic. There are papillae, through which collecting ducts from glands run. Lamina propria run into the papillae. Hydrochloric acid and pepsin are produced in the glands in the submucosa. Single tubular glands are grouped into lobules with a common opening into a papillae. There is a serous membrane of mesothelial cells attached to the outer longitudinal layer of muscle. The proventriculus has 3 layers of lamina muscularis and no parietal cells.
Links
Test yourself with the Avian Alimentary Tract Flashcards