华支睾吸虫亚显微结构的研究Ⅱ.消化系统

THE SUBMICROSCOPIC STRUCTURE OF CLONORCHIS SINENSIS Ⅱ. THE DIGESTIVE SYSTEM

消化系统包括咽、食道和肠管。咽由上皮层、间质层构成,肌层位于间质中,且围绕上皮层呈放射状排列,肌束之间有两种不同形态的细胞,食道的上皮层与咽相似,但间质并不突入上皮内。肌束自上皮之下为环肌束、放射状肌束、纵肌束。间质中有一种特征性细胞。肠壁上皮无明显的细胞界限,并向肠腔内伸出繁多的树支状突起。核常位于突起基部,核质及胞质中均发现病毒样晶状体。上皮中细胞器丰富,有内质网、游离型多聚核糖体、线粒体及溶酶体。间质为胶原纤维样,其中有环肌束及纵肌束交杂排列。

This paper describes the submicroscopic structure of pharynx, esophagus and in- testine. The wall of pharynx and esophagus are consisted of epithelium and interstitial plasma lay- er, the muscle bundles are in this layer. The epithelium is similar to the integument, except none of the rod-like and disc-like granules. The interstitial plasma layer protract to the epithelium in the pharynx but not in the esophagus. there are strong radio-muscles around the pharynx and in the outer there are longitudinal muscle bundles regularly arranged. Two characteristic cells were observed in the pharynx,the former is between.the radio-muscle bundles,the later is nearby the wall of pharynx. The later cells have many long protuberanes. These protuberanes of some cells link together and look like net. The esophagus has thicker interstitial plasma layer, there are cir- cular, longitudinal and radio-muscle bundles in it.