New aspects of the esophageal histology of the domestic goat (Capra hircus) and European roe deer (Capreolus capreolus),Veterinary Medicine and Science

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New aspects of the esophageal histology of the domestic goat (Capra hircus) and European roe deer (Capreolus capreolus)
Veterinary Medicine and Science ( IF 1.8 ) Pub Date : 2021-06-19 , DOI: 10.1002/vms3.555
Justyna Sokołowska ₁ , Kaja Urbańska ₁ , Joanna Matusiak ₁ , Jan Wiśniewski ₂

Affiliation

The present study examines the esophageal wall of animals from two distinct families of the Ruminantia: domestic goats and European roe deer. Five fragments were collected from the entire length of the esophageal wall in five goats and four roe deer and subjected to microscopic and morphometric analyses. All layers of the esophageal wall except the tela submucosa were found to be thicker in the goats. In both species, the esophagus was lined by parakeratinized stratified squamous epithelium, and the tela submucosa was deprived of glands along its entire length. However, the structure of the lamina muscularis mucosae was better developed in goats: it was found to be discontinuous in the proximal part, and then became fused in the cervical part, that is around the most proximal quarter of its length. In contrast, in roe deer, the lamina muscularis mucosae began as sparse, thin muscle bundles at the pharyngeal-esophageal junction, which thickened and clustered further down the esophagus, but did not fuse. Our findings regarding the microscopic structure of the ruminant esophagus are not fully consistent with the widely-accepted view and suggest that the histological structure of the esophagus demonstrates interspecies variation within this large suborder. More precisely, species-specific differences can be seen regarding the presence of esophageal glands and parakeratinized epithelium, and in the organization of the lamina muscularis mucosae.

中文翻译：

家山羊 (Capra hircus) 和欧洲狍 (Capreolus capreolus) 食管组织学的新方面

本研究检查了来自两个不同的反刍动物科动物的食道壁：国内山羊和欧洲狍。从五只山羊和四只獐鹿的整个食管壁长度上收集了五个碎片，并进行了显微镜和形态计量分析。除 tela submucosa 外，山羊的所有食管壁层均较厚。在这两个物种中，食道内衬有角化不全的复层鳞状上皮，而粘膜下层的整个长度上都没有腺体。然而，山羊的黏膜肌层结构更发达：它在近端部分是不连续的，然后在颈部部分融合，即在其长度的最近端四分之一附近。相比之下，在狍中，黏膜肌层开始时在咽-食管交界处是稀疏的、薄的肌束，它增厚并聚集在食道下方，但没有融合。我们关于反刍动物食道微观结构的研究结果与广泛接受的观点并不完全一致，并表明食道的组织学结构在这个大亚目内表现出种间变异。更准确地说，在食管腺体和角化不全上皮的存在以及粘膜肌层的组织中可以看到物种特异性差异。

更新日期：2021-06-19

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