罗氏沼虾消化系统组织学的光镜与扫描电镜观察

本文进行了罗氏沼虾（Macrobrachiumrosenbergii）消化系统的光镜组织学和扫描电镜研究。观察发现，罗氏沼虾的贲门胃内无齿，胃壁背、腹面的一定部位有角质板的特殊结构。中肠很长，占据头胸部的后半部分和腹部的大部分；中肠上皮细胞的游离端和中肠腺小管细胞的游离端均有纹状缘，无角质膜。后肠很短，无纹状缘。消化道上皮细胞有无纹状缘是区分中肠与前、后肠的重要标准之一。

OBSERVATIONS ON THE HISTOLOGY OF DIGESTIVE SYSTEM WITH LIGHT AND SCANNING ELECTRON MICROSCOPY IN MACROBRACHIUM ROSENBERGII

The digestive system of giant freshwater prawn (Macrobrachium rosenbergii)has been studied with light microscopic histology and scanning electron microscopy. It was found no any tooth in cardiac stomach, but there were cuticle plates in the dorsal and ventral wall of the stomach. The midgut is rather longer, from the post part of cephalothorax to the most part of abdominal region. The free ends of epithelium cells in midgut have striated borders, and cells directly contact with the lumen of the midgut. The striated borders also appear in the tubule cells of midgut gland. The hindgut is short, has no striated border. The epithelium cells of digestive tube with or without the striated border can be used as one of important standard for distinguishing the midgut from foregut and hindgut.