Morpho-histology of the alimentary canal of pheasant (Phasianus colchicus)
Benamolaei Parisa, Banan Khojaste, Seyed Mahdi.
Department of Animal Biology, Faculty of Natural Science, University of Tabriz, Iran
Parisa B, Khojaste B, Mahdi S., Morpho-histology of the alimentary canal of pheasant (Phasianus colchicus), Onl J Vet Res., 23 (6):615-627, 2019. Authors describe morpho-histology of the alimentary canal in Phasianus colchicus. The wall of the entire alimentary canal was composed of tunicas mucosa, submucosa, muscularis and serosa/adventitia. The esophagus had longitudinal folds in transversal section and a thick non-keratinized stratified squamous epithelium. There were numerous mucous glands in the lamina propria with simple columnar epithelium. Crops histology was similar to esophagus, but had less mucous glands. The muscularis had inner circular and outer longitudinal layers. The proventriculus was lined by simple columnar epithelium with numerous submucosal glands in the submucosa. The outermost layer of the proventriculus was a tunica serosa. The surface of gizzard revealed a layer of rough cuticle and simple columnar epithelium. There was no muscularis mucosae in the gizzard but its muscular layer was composed of smooth muscles. The mucosa of small intestine showed villi of various sizes lined by simple columnar epithelium. The villi were numerous and well developed in duodenum. The large intestine revealed mucosal folds and short villi. The caecal tunica mucosa was folded into plicae rather than villi and tubular glands were evident. The tunica serosa covered the outer surface of intestinal wall. The findings are supported by numerous images.
Keywords: alimentary canal, common pheasant, microscopic anatomy, morphohistology, Phasianus colchicus.