大鸨消化系统组织学观察

应用常规石蜡切片，H.E.染色，对3只大鸨消化系统组织结构进行了观察。结果表明，大鸨食管复层扁平上皮有化不明显，粘液腺十分丰富。腺胃内有发达的复管状腺和单管状腺，密集排列在胃壁内。腺胃乳头内有发达的粘液腺，开口于乳头顶部，复管状腺的集合窦则开口于粘液腺底部。肌胃粘膜内密布单管状腺，无粘膜肌。小肠内环肌发达，粘膜下层不明显，十二指肠处绒毛最高，分支最复杂，无十二指肠腺。盲肠前部具发达的绒毛，而中后部不明显，直肠绒毛发达，杯状细胞增多，盲肠与直肠粘膜下层较发达。肝、胰小叶界限不清。

Observations on Histology of Bustard (Otis tarda limaells) Digestive System

In this paper, the histological structure of 3 bustard's digestive systems were observed on routine paraffin sections that were stained with H.E. The result show: The oesophagus has a thick stratified squamous epithelium which is little keratinized with numerous mucous glands. The walls of the proventriculus are composed mainly of compound tubular glands. There is a big mucous gland in the raised papillae and opening at the apex of the papilla, the central cavity of the lobule drains into the bottom of mucous gland cavity. The gizzard glands are arranged densely in the tunica mucosa without muscularis mucosa. The inner circular layer of muscularis is rather developed and the submucosa is so poorly developed as to be almost nonexistent in most of the small intestine. The villa with most complicated branches are the highest and the duodenal glands is absent in the duodenum. The villa are well developed in proximal caecum and very short and blunt in middle and distal caecum; and reappear as numerous long flat leaf shaped structures in the rectum with more numerous goblet cells. The submucosa is obvious in the caecum and rectum. The lobulation is not so distinct in the liver and pancreas.