The avian oesophageal motor function and its nervous control: Some physiological, pharmacological and comparative aspects

Mulè, Flavia

doi:10.1016/0300-9629(91)90121-r

Cited by 9 publications

(5 citation statements)

References 32 publications

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“…It consists of two parts in birds, the cervical and thoracic while in ruminant, the abdominal oesophagus makes the third oesophageal segments [5–7]. …”

Section: Introductionmentioning

confidence: 99%

Histogenesis of the Oesophagus of Guinea Fowl (Numida meleagris) at Prehatch and Posthatch

et al. 2016

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The histogenesis of the primordial oesophagus was studied to determine the period in which the tunics of the oesophagus developed and became functional in the helmeted guinea fowl (Numida meleagris). Eighteen embryos and nine keets were studied at prehatch and posthatch, respectively. Simple columnar epithelium surrounded by mesenchymal cells was obvious at the 8th day of embryonic development. By the 19th day of embryonic development, the four tunics, tunica mucosa, submucosa, tunica muscularis, and tunica adventitia/serosa, were beginning to differentiate from the mesenchymal cells and also the primordial oesophageal glands appeared as clusters of cells that invaginate from the epithelium. By the 27th day, the tunics were clearly differentiated and the primordial glands were fully developed as evident with positive reaction to Periodic Acid Schiff (PAS). The tunics of the muscularis were not well developed till at posthatch. This study therefore concludes that the primordial oesophagus is active at the late incubation due to mucin secretion by mucous glands but fully functional at posthatch since the tunica muscularis is completely developed at posthatch.

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“…It consists of two parts in birds, the cervical and thoracic while in ruminant, the abdominal oesophagus makes the third oesophageal segments [5–7]. …”

Section: Introductionmentioning

confidence: 99%

Histogenesis of the Oesophagus of Guinea Fowl (Numida meleagris) at Prehatch and Posthatch

et al. 2016

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“…The esophagus in birds is passage for the food (White, 1968;Sisson and Grossman, 1986) observed that the avian esophagus is on the right side of neck (mammal present it was on left side) and it was placed between the pharynx and stomach glandular portion, it was thin and dilatable walls with a diameter relatively larger than of mammals. According to Levin (1984) and Mule (1991)the avian esophagus consist of two parts, cervical and thoracic, while in mammals there was three parts, cervical, thoracic and abdominal .The present study was undertaken to investigate the histological study on esophagus and liver offivespeciesofaquaticbirds:water rail (Rallusaquaticus), spotted crake (Porzanaporzana), little crake (Zaporniaparva), common coot (Fulicaatra) and common moorhen (Gallinulachloropus), in order to show some difference among them.…”

mentioning

confidence: 98%

Comparative Histological Study Ofesophagus and Liver in Some Aquatic Birds

Omar¹,

Deef²,

Khattab³

2021

IJAR

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The present work aims to investigate the differences in the structure of liver and esophagus in five species of birds in Egypt having the same food habits.The birds under investigation are: water rail, spotted crake, little crake, common coot and common moorhen. Five birds were obtained from local hunters in Damietta, Egypt all of these birds are belonging to the same family (Rallidae)and all of them are omnivorous, but we found some difference after microscopical examination of liver and esophagus. The birds were dissected, esophagus and liver were fixed and stained for microscopic comparative study.The results revealed that there are some histological differences after microscopical examination to liver and esophagus in five species.In esophagus: Mucous glands are bigger in little crake than that in Rallus aquaticus,muscularis mucosa layer is thicker in Rallus aquaticus and common coot than that in Gallinula chloropus, inner circular in spotted crake is thinner that in Gallinula chloropus, and most thick in common coot. In Liver: Hepatocytes in common coot are polygonal in shape, have rounded nucleusand there are some sinusoids between hepatocords in liver and presence of secondary bronchial cavity in Gallinula chloropus and Rallus aquaticus.

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“…In birds, as in mammals, the small intestine is subdivided into duodenum, jejunum and ileum. The intestinal length varies depending on the species, being shorter in the case of frugivores, carnivores and insectivores, and longer in the case of granivores, herbivores and piscivores (Mulè, 1991;McLelland, 1993;Klasing, 1999). Unfortunately, due to the advanced state of decomposition of the corpses, we were unable macroscopically to point out the separation of the actual segments (duodenum, jejunum and ileum).…”

Section: Discussionmentioning

confidence: 96%

“…The gizzard is placed on the left side of the midline and can be palpated as a firm, caudal positioned organ at the sternum. On an evolutionary scale, the stomachs of birds have adapted in accordance with their diet (McLelland, 1993;Mulè, 1991). McLelland (1979McLelland ( , 1990, claims that piscivorous and carnivorous birds show no obvious difference in the appearance of the two stomachs, easily distensible for swallowing whole prey.…”

Section: Discussionmentioning

confidence: 99%

The Comparative Anatomy of the Upper Digestive System in 26 Species of Zoophagous-Polyphagous Palearctic Birds

Preja,

Cipou,

Martonos

et al. 2023

Int. J. Morphol.

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Birds are the most diversified organisms on Earth, with species covering various niches in each major biome, being essential to understand the modern ecosystem. This study concentrates on the diversification of the anatomical structure of the upper digestive tract for 26 species of zoophage-polyphagous birds and the anatomical differences in the digestive system to reveal aspects related to their evolution and diversification. The trophic spectrum of the selected birds includes several categories of food, or, as in the case of strictly carnivorous birds, to a single food category. After performing the dissections, the digestive tract was separated from the carcass and each digestive segment was measured and analysed. In this study, it was demonstrated that the birds' feeding behaviour influence the macroscopic particularities of the digestive system, more visible in the cranial portion (oropharyngeal cavity, esophagus, proventriculus and gizzard), with little descriptive information in the literature. The tongue is poorly developed and immobile in piscivorous birds, while the tongue of insectivorous birds is long and moves considerably away from the tip of the bill. The esophagus was stretchable and presents longitudinal folds on its entire surface in piscivorous species and not extensible in insectivorous birds.

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The avian oesophageal motor function and its nervous control: Some physiological, pharmacological and comparative aspects

Cited by 9 publications

References 32 publications

Histogenesis of the Oesophagus of Guinea Fowl (Numida meleagris) at Prehatch and Posthatch

Histogenesis of the Oesophagus of Guinea Fowl (Numida meleagris) at Prehatch and Posthatch

Comparative Histological Study Ofesophagus and Liver in Some Aquatic Birds

The Comparative Anatomy of the Upper Digestive System in 26 Species of Zoophagous-Polyphagous Palearctic Birds

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