Histomorphological and Histochemical Study of the Small Intestine of the Striated Scope Owls (Otus Scors Brucei)

Al-Saffar, F. J.; Al-Samawy, E. R. M.

doi:10.3923/sjchbio.2016.1.10

Cited by 13 publications

(12 citation statements)

References 13 publications

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“…Further, the expression of collagens at the serosa and submucosa was moderate in the lamina propria of the villi and minimal in the tunica muscularis. These observations suggest that collagen localization is involved in the transport and regulation of absorbed food promoted by rhythmic contraction of the muscularis muscle fibers (Al‐Saffar & Al‐Samawy, 2016; Pandit et al, 2018; Verma, Malik, Shrivastava, & Parmar, 1999).…”

Section: Discussionmentioning

confidence: 99%

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

El‐Mansi

El-Bealy

Rady

et al. 2021

Microscopy Res & Technique

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We describe the functional morphology of the digestive tract of the Eurasian collared dove, Streptopelia decaocto using anatomical, morphometric, histological, histochemical, and ultrastructure techniques, and relate our findings to the species' dietary niche. Our results revealed that the esophagus is displaced on both sides of the neck and has highly folded tunica mucosa, which confer greater elasticity for efficient swallowing and passage of food to the crop. The proventriculus is delicate and its mucosal layer contains polymorphic glands with dense profound and superficial secretory units that open to the luminal surface by gastric pores. The ventriculus is biconvex and lined with a keratinized koilin membrane. The tubular glands within the mucosal lining include the isthmus, the neck, and the basal segment that comprise chief and basal cells with prominent nuclei. At the cuticle-mucosal interface, pyramidal vertical rodlets of the cuticle are secreted and superficially covered by a thin film of a horizontal matrix. The mucosa of the ileum form pyramidal villi that are oriented perpendicularly to the central lumen. Enterocytes infiltrated with goblet cells make up the epithelial lining of the villi. There are subtle differences in the thicknesses of corresponding tunics together with histochemical reactions of alcian blue (AB) and Masson-Goldner trichrome (MT) for their microstructures. Overall, our findings reveal remarkable convergence of both macro-and microstructures in S. decaocto to other granivorous species, and offer further evidence of the close association between functional morphology and feeding style relative to food swallowing, digestion, and absorption.

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Section: Discussionmentioning

confidence: 99%

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

El‐Mansi

El-Bealy

Rady

et al. 2021

Microscopy Res & Technique

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“…The muscularis mucosa was present in the small intestine of the common pheasant, similar to that observed in (Hanafy et al, 2020) in Garganey ( Anas querquedula ). While this layer was absence in some avian species such as the jejunum part of owls and other carnivorous birds (Al Sheshani, 2006; Al‐Saffar & Al‐Samawy, 2016). In the ostrich's small intestine, there are two layers of muscular mucosa.…”

Section: Discussionmentioning

confidence: 99%

Histology of the small intestine in the common pheasant (Phasianus colchicus): A scanning electron microscopy, histochemical, immunohistochemical, and stereological study

Goodarzi

Bazm

Poladi

et al. 2021

Microscopy Res & Technique

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The present investigation was conducted to investigate the histology, immunohistochemistry, stereology, and ultrastructure of the small intestine in the common pheasant (Phasianus colchicus) using light and scanning electron microscopy (SEM). Ten birds were included in the study. The obtained findings revealed that three parts in the small intestine namely duodenum, jejunum, and ilium constituted of four layers from innermost to outermost including tunica mucosa, tunica submucosa, tunica muscularis, and tunica serosa. All parts of the small intestine had simple columnar epithelium with goblet cells reacted with Periodic Acid‐Schiff and Alcian Blue stains especially in the jejunum and ileum. The cells on the tip of the duodenal villi showed immuno‐positive staining for Sox9 protein, while the jejunum and ileum were negative. The jejunum had longest villi; however the duodenum had deepest crypt (p < .05). The villus surface of jejunum was significantly higher than duodenum and ileum (p < .05). SEM images revealed that the duodenum had cauliflower and leaf‐like villi with plicas and recess between them. Jejunum had finger‐like villi with a velvety view. The shape of the ileal villi was like that observed in the jejunum with slight differences. In conclusion, the jejunum was the most prominent region in the small intestine in terms of morphologic and morphometric features, which could be attributed to the absorption of more nutrients in this area. These obtained findings would be useful to improve the knowledge in the field of histophysiology properties of the bird's digestive system.

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“…This attributed to the overcrowded glands, which distributed along the crop's walls in cattle egrets rather than the intermittently distributed ducks ' glands. In addition, the nature of the gland secretions was mainly sulfated mucopolysaccharides in cattle egrets rather than the ducks, which exhibit an important role in the digestion especially in the carnivorous species of a predominately protein-based diet [32] in the cattle egret [33] and in many wild and domestic birds. In contrast, the investigated pigeons , crops showed no glands similar to that stated previously [23,34] in the homing pigeons.…”

Section: Discussionmentioning

confidence: 99%

Crop Morpho-Histological Peculiarities in Domesticated Pigeons (Columba livia domestica), Cattle Egret (Bubulcus ibis) and Domesticated Ducks (Anas platyrhynchos domestica)

Mohammed

Abuel-Atta

Ghonimi

et al. 2021

Zagazig Veterinary Journal

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The crop architecture varies among different avian species consistent with their feeding habits. Therefore, twenty-one of mature healthy male pigeons (granivorous), cattle egrets (carnivorous), and ducks (omnivorous), seven per species, were utilized for the histological, immunohistochemical, and ultrastructural analyses. Histologically, the mucosal folds were covered by non-keratinized stratified squamous epithelium in the three investigated species. The mucosal glands are only peculiar to the crops of the cattle egrets as well as the ducks, while the pigeons' crops were devoid of any secretory units. Morphometrically, the optical densities of the Alcian blue (AB) and periodic acid Schiff (PAS) reactions in the secretory glands, the area % of collagen fibers, the thickness of the tunica musculosa were measured and declared significant differences among the three studied avian species. Immunohistochemical reaction revealed ki-67 immuno-positive reactivity in the nuclei of basal cell layers of the crop epithelium in pigeons only. Regarding ultrastructure investigation, the covering epithelium of all studied species had been shown to be the basal layer of cuboidal to tall columnar cells with desmosomal junctions at the level of their cellular interdigitation, intermediate layers of large irregular polygonal cells with obviously increased cytokeratin filaments especially in the ducks and cellular interdigitation in between. The superficial layer of flat-shaped cells in the three investigated species manifested by desmosomal junctions in between but at the level of the surface squamous cells of the superficial layer, a fine lateral process is only inspected in the pigeons. In conclusion, the crop glands characterized by supranuclear electron dense secretory granules in the cattle egrets and electron-lucent in ducks.

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Histomorphological and Histochemical Study of the Small Intestine of the Striated Scope Owls (Otus Scors Brucei)

Cited by 13 publications

References 13 publications

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

Histology of the small intestine in the common pheasant (Phasianus colchicus): A scanning electron microscopy, histochemical, immunohistochemical, and stereological study

Crop Morpho-Histological Peculiarities in Domesticated Pigeons (Columba livia domestica), Cattle Egret (Bubulcus ibis) and Domesticated Ducks (Anas platyrhynchos domestica)

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