Species‐specific differences of the avian oesophagus: Histological and Ultrastructural study
| Autor: | Asmaa A A Mohammed, Ahmed Awad Abuel-Atta, Nesma I. El-naseery, Wael Ghonimi |
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| Rok vydání: | 2021 |
| Předmět: |
Oesophageal glands
Mucous Membrane General Veterinary Perinuclear halo Epithelial Cells General Medicine Anatomy Biology digestive system digestive system diseases Birds Esophagus Cervical oesophagus medicine.anatomical_structure Submucosa Adventitia medicine Ultrastructure Animals Cattle egrets Cattle Cervical esophagus |
| Zdroj: | Anatomia, Histologia, Embryologia. 50:788-800 |
| ISSN: | 1439-0264 0340-2096 |
| DOI: | 10.1111/ahe.12721 |
| Popis: | The oesophagus is a muscular tube comprised of cervical and thoracic regions. Several studies have clarified the histological structure of the oesophagus. However, its histoarchitecture in relation to variable dietary habits of each species is still unclear. In the current study, 21 pigeons, cattle egrets and ducks, n = 7, each was used. Macroscopically, the oesophagus of cattle egrets either the cervical or thoracic parts was the longest among the pigeons and ducks. Histologically, the oesophagus comprised of four distinct tunicae: mucosa, propria submucosa, musculosa and adventitia or serosa. A great structural variation in these layers among the three investigated species was recorded. In the cervical oesophagus of pigeons, the superficial squamous cells showed perinuclear halo zone, the propria submucosa was characteristically lacked any gland. Moreover, its musculosa was very thick. On the other hand, the intraepithelial glands were characteristically distributed along the whole length of the cattle egret's oesophagus. Interestingly, the cervical esophagus of the ducks showed submucosal associated lymphatic tissue; diffuse and nodular Ultrastructurally, the oesophageal glands showed secretory granules of variable electron densities, electron-lucent in the pigeons and ducks and electron-dense in the cattle egrets. |
| Databáze: | OpenAIRE |
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