Histology of the stomach of <i>Tilapia nilotica</i> (Linnaeus, 1758) from the River Nile

Osman, A. H. K.; Caceci, Thomas

doi:10.1111/j.1095-8649.1991.tb03107.x

Cited by 62 publications

(62 citation statements)

References 23 publications

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“…This result agrees with that of Osman andCaceci (1991), in Tilapia nilotica, andPark andKim (2001), in Misgurnus mizolepis. Moreover, Temkin and McMillan (1986) stated that the gut of Carassius auratus lacks the discrete aggregations of lymphoid tissue, such as the Peyer's patches of mammals, but possesses a diffused lymphoid tissue as numerous lymphocytes.…”

Section: In Esox Lucius and Silurus Glanis Andsupporting

confidence: 82%

Comparative study on the intestine of Schilbe mystus and Labeo niloticus in correlation with their feeding habits

Amer

Naguib

Ghafar

2008

Egypt. J. of Aquatic Biolo. and Fish.

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he present investigation aims to illustrate the morphological, histological and ultrastructural differences in the intestine of a carnivorous fish, Schilbe mystus and a herbivorous fish, Labeo niloticus, in correlation with their feeding habits. The histological examination of the mucosa of the intestine of both studied species revealed that it is built up of a simple columnar epithelium that contains goblet cells. Though these, are generally more numerous in the intestine of Schilbe mystus than in that of Labeo niloticus. The ultrastructural investigation of the mucosa of the duodenum and ileum of Schilbe mystus revealed that the enterocytes are tall columnar cells and possess well-developed microvilli, numerous mitochondria, microtubules and numerous lipid droplets. The ultrastructural examination of the mucosa of the ileum of Labeo niloticus revealed that the enterocytes are tall columnar and possess well-developed microvilli, numerous mitochondria, microtubules, a few endocytotic channels and aggregated chylomicrons. The enterocytes of the rectum of both studied species are tall columnar and are characterized by the presence of short and wellspaced microvilli, a well-developed vesiculotubular system, numerous microtubules and mitochondria. In addition, the rectal enterocytes of Schilbe mystus contain endocytotic vesicles. The intestinal muscularis of both studied species is well-developed and built up of unstriated muscle fibres, which are arranged into two layers: an inner circular layer and an outer longitudinal one. The rectal muscularis of both studied species is thicker than that of the rest of the intestine.

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Section: In Esox Lucius and Silurus Glanis Andsupporting

confidence: 82%

Comparative study on the intestine of Schilbe mystus and Labeo niloticus in correlation with their feeding habits

Amer

Naguib

Ghafar

2008

Egypt. J. of Aquatic Biolo. and Fish.

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“…Apart from blood and lymphatic conducting systems, and visceral musculature in the mouth and pharynx regions, some vertebrates also acquire striated muscles in tunica Muscularis of the stomach [58,59] and intestine [60,61].…”

Section: Implication #2mentioning

confidence: 99%

Striated muscles in visceral organs of vertebrates

Субботин¹

2016

J Histol Histopathol

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Pathologists involved in the examination of small rodent tissues are familiar with the presence of striated muscle in walls of intrapulmonary veins. Because these striated muscles express cardiomyocyte markers and are involved in rhythmical contraction during systole, this morphologic arrangement was named "pulmonary myocardium". Striated cardiac muscles of intrapulmonary veins have also been found in numerous species, including non-human primates. Great attention has been given to animal striated pulmonary veins because in humans, the presence of cardiomyocytes in the pulmonary veins (myocardial sleeves) is a major origin of paroxysmal atrial fibrillation. It is unequivocally suggested that direct extension/migration of cardiomyocytes from the left atrium into pulmonary veins is the origin of "pulmonary myocardium". This model sounds logical in regard to humans and large mammals because in these cases, striated myocytes extend into pulmonary veins only by 10-30 mm from the left atrium. However, the cardiomyocyte direct extension/migration model becomes less parsimonious when applied to the numerous small intrapulmonary veins with striated muscles in their walls in small mammals. In 1972, Alfred Sherwood Romer, renowned for his contributions to the study of vertebrate evolution, suggested that visceral smooth muscle cells developed a striated phenotype due to the need for more efficient musculature. Romer theorized that the primary anatomical division of the vertebrate muscular system should be not into smooth and striated types but into somatic and visceral systems, because the line of division along the gut between striated and smooth musculature is not a fixed point. Romer's work offered a parsimonious model for the presence of striated muscle in the walls of the intrapulmonary veins-visceral smooth muscle cells, which are capable of differentiating into striated muscle cells, are always present; whether they differentiate depends on functional demands. From Romer's hypothesis, it also could be foreseen that striated muscle could appear in visceral compartments other than the blood circulatory system and pharyngeal muscles to facilitate functional needs. Indeed, it was shown that 1) the lymphatic system of many low vertebrates acquired a lymphatic heart with striated muscle cells; 2) some vertebrates also acquire striated muscles in tunica Muscularis of the stomach and intestine. The facts above undoubtedly corroborate Prof. Romer's notion on the evolution of the vertebrate muscular system.

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“…1994). According to OSMAN & CACECI (1991), besides protecting the mucosa, these mucins also regulate the pH of the gastric fluid, explaining the variations in the gastric fluid pH in different species with different diets.…”

Section: Discussionmentioning

confidence: 99%

Microscopic morphology and histochemistry of the digestive system of a tropical freshwater fish Trichomycterus brasiliensis (Lütken) (Siluroidei, Trichomycteridae)

Ribeiro

Fanta

2000

Rev. Bras. Zool.

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The digestive system of Trichomycterus brasiliensis (Lütken, 1874), a small sized tropical Teleostean fish widely distributed in South America, was studied. Tissue samples were prepared for light and scanning electron microscopy (SEM). Trichomycterus brasiliensis shows stratified esophagus epithelium with taste buds and goblet cells with neutral and acid mucus at the anterior region. The stomach is caecal, presenting a pyloric valve with neutral mucus cells. At the terminal portion it is surrounded by a thick muscular wall. The intestine shows two loops; the epithelium is single columnar, with acid and neutral mucus in goblet cells. Multicellular intestinal glands are absent. Granular cells are often seen in the mucosa, less in the submucosa but were not observed in the muscularis. After the intestine-rectal valve, the rectum shows lower mucosal folds, more goblet cells and a thicker muscularis. No lobes were observed at the liver. Small regions of pancreatic tissue may be identified within the hepatic tissue mainly surrounding vessels and ducts. A compact pancreas may also be observed ventrally to the stomach and covering the bile duct. The possible significance of the heterogeneous character of the digestive tube mucosubstances is discussed. The digestive system of T. brasiliensis presents structural characteristics of a predator fish

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Histology of the stomach of Tilapia nilotica (Linnaeus, 1758) from the River Nile

Cited by 62 publications

References 23 publications

Comparative study on the intestine of Schilbe mystus and Labeo niloticus in correlation with their feeding habits

Comparative study on the intestine of Schilbe mystus and Labeo niloticus in correlation with their feeding habits

Striated muscles in visceral organs of vertebrates

Microscopic morphology and histochemistry of the digestive system of a tropical freshwater fish Trichomycterus brasiliensis (Lütken) (Siluroidei, Trichomycteridae)

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