金丝猴食管和胃连接部的组织学研究

本文研究了金丝猴食管和胃连接处的组织结构。金丝猴的食管粘膜为典型的复民鳞状上皮,食管末端含有粘膜腺,粘膜表面有轻微的角质化。管壁外纵肌层有少量的横纹肌。与胃粘膜的连接均位于胃的贲门部以内,两种上皮的连接是突然的,不存在过渡。 贲门腺为少量的分枝管状腺,短而直,由粘膜细胞构成,对PAS染色呈阳性反应。

HISTOLOGICAL INVESTIGATIONS ON ESOPHAGO-GASTRIC JUNCTIONAL AREA IN RHINOPITHECUS

A study of the esophago-gastric junctional area was carried out in 5 specimens of golden monkey of our country. The border of the mucous membrane between the esophagus and the stomach is very clear. This border is located in the cardiac orifice. The esophageal mucous membrane is thick and contains a few of the mucosal glands which are limited in the narrow zone near cardiac end of the esophagus, but the submucosal glands are not found in this area. The esophageal mucosal epithelium is typical stratified squamous and is characterized by the keratinization. The muscularis mucosae is broad, whereas the lamina propria, relatively thin. The muscularis is composed of two primary layers-an inner circular and outer longitudinal layer. Some of striated muscle bundles are intermingled in the longitudinal layer. The orifice between the esophagus and the stomach in boundedly band of circular muscles which are much thicker than that any elsewhere. The cardiac glands are short branched tubular ones. The cells of the cardiac glands are mucous. The mucous cell granules stain intensely, with periodic acid-Schff (PAS). Histologically there is an abrupt transition from squamous esophageal epithelium to columnar gastric epithelium at the esophagogastric junction.