牛咽部组织结构的显微观察

[目的]运用组织学方法对3.5岁龄公牛咽部组织结构进行了观察与分析,以研究牛咽部不同部位显微结构。[方法]使用石蜡切片及HE和PAS染色在光学显微镜下观察牛咽部不同部位组织形态及细胞类型。[结论]牛鼻咽部黏膜层属于假复层柱状纤毛上皮结构,其间有大量的杯状细胞,没有角质层;喉咽部和口咽部属于复层扁平上皮结构,其间没有杯状细胞,有角质层。

Microscopic Observation of the Tissue Structure of Bovine Pharynx

In order to study the microstructure of different parts of the bovine pharynx, the histological structure of pharyngeal tissues of a 3.5-year-old bull was histologically observed. The bull pharynx tissue was collected and was used to prepare paraffin sections. The paraffin sections were subsequently stained using HE staining and PAS staining method to observe the tissue morphology and cell types of different parts of pharynx. Bovine nasopharynx mucosa layer belonged to pseudostratified columnar ciliated epithelium structure, among which, there were a large number of goblet cells but no cuticle; laryngopharynx and oropharynx belonged to stratified squamous epithelium structure, among which, cuticle was observed but goblet cells were absent.