Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.
Department of Cell and Tissues, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.
Sci Rep. 2023 Oct 23;13(1):18096. doi: 10.1038/s41598-023-45355-1.
The development of the glandular stomach was studied using light, electron, and fluorescent microscopy. The research used 130 Japanese quail eggs from the second to the seventeenth days of incubation.The proventriculus could be distinguished on the3rd day. Its wall consisted of four tunics: tunica mucosa, very thin tunica submucosa, tunica muscularis, and outermost tunica serosa. Mucosal folds appeared on the 8th day. The luminal epithelium was pseudostratified columnar in type and transformed into simple columnar by the 10th day. The mucosal papillae emerged on the 11th day, spiraled on the 15th day, and had a distinct whorled look by the 17th day. Two types of proventricular glands were recognized: compound tubuloalveolar and simple tubular glands. Both types were situated within the tunica mucosa. On the 4th day, the compound glands emerged as evaginations of the lining epithelium. It began to branch on the 8th day and became well established by the 11th day. The simple glands appeared on the 11th day as localized down-growths of the luminal epithelium forming solid cords. On the 15th day, many of them showed complete canalization. On the 8th day, the muscular coat was differentiated into the lamina muscularis mucosae and tunica muscularis.
采用光镜、电镜和荧光显微镜研究了腺胃的发生。研究使用了 130 枚孵化第 2 至 17 天的日本鹌鹑蛋。第 3 天可以区分前胃，其壁由四层组成：黏膜层、很薄的黏膜下层、肌层和最外层的浆膜层。第 8 天出现黏膜皱襞，第 10 天腔上皮由假复层柱状变为单层柱状，第 11 天出现黏膜乳头，第 15 天呈螺旋状，第 17 天出现明显的螺旋状外观。前胃腺有两种类型：复管状腺泡和单纯管状腺。两种腺体均位于黏膜层。第 4 天，复合腺体从前胃腔上皮的陷凹中出现，第 8 天开始分支，第 11 天形成。单纯腺体于第 11 天出现，为腔上皮的局部下延，形成实心索。第 15 天，其中许多腺体完全出现管腔化。第 8 天，肌层分化为黏膜肌层和肌层。
