Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt.
Microsc Res Tech. 2021 Oct;84(10):2244-2253. doi: 10.1002/jemt.23777. Epub 2021 Apr 14.
The present work was the first attempt to examine the oesophagus and stomach of the Eurasian common moorhen grossly and by SEM. The oesophagus was composed of long cervical and short thoracic parts. The longitudinal folds of the cervical part were narrower than that of the thoracic part, while the depressions between these folds were shallower and wider in the cervical part. On the epithelial surface of the oesophagus, micropapillae were present and they were numerous and smaller at the level of the cervical part. The openings of the oesophageal glands were circular at the level of the cervical part and oval to elliptical at the thoracic part. The crop was absent. The proventriculus was fusiform in shape; its mucosa was arranged in several, concentrically arranged mucosal folds connected with each other by transverse folds. The proventriculus glands were oval and opened by raised papillae on the epithelial surface. The gizzard was oval; its mucosa was lined by a horizontal layer of cuticle appeared like the fish scales, while the vertical part of the cuticle appeared as thin rods. The folds of the oesophagus are functioning for the expansion for the passage of the food particles. The tunica musculosa of the gizzard was thick to help in grinding of the food particles.
本研究首次尝试对欧亚普通黑水鸡的食道和胃进行大体和扫描电镜观察。食道由长的颈部和短的胸部两部分组成。颈部的纵向褶皱比胸部的狭窄，而这些褶皱之间的凹陷在颈部较浅且较宽。食道上皮表面存在微乳头，在颈部水平数量较多且较小。食道腺的开口在颈部为圆形，在胸部为椭圆形至长椭圆形。嗉囊缺失。前胃呈梭形，黏膜排列成几个同心的黏膜褶皱，由横褶皱相连。前胃腺呈椭圆形，在表面上皮的乳突上开口。肌胃呈椭圆形，黏膜被一层水平的角质层覆盖，类似于鱼鳞，而角质层的垂直部分则呈细杆状。食道褶皱的功能是为食物颗粒的通过而扩张。肌胃的黏膜肌层较厚，有助于磨碎食物颗粒。
