双峰驼胃腺囊区有腺部的组织学与组织化学研究

Study on histology and histochemistry of the glandular sac areas in stomach of bactrian camels in China

采用组织学与组织化学方法对骆驼前胃特有的三个腺囊区有腺部黏膜研究表明 ,其黏膜的组织结构和糖共轭物呈色反应基本相同 ,并和骆驼及其他动物的贲门腺区结构相似。所含腺体为黏液性腺体 ,呈短而直的单管状 ,直接开口于浅而密集的胃小凹。黏膜表面上皮、胃小凹上皮和腺上皮均呈柱状 ,但从黏膜表面到腺体盲端逐渐变矮 ,腺底部上皮核上细胞质呈弱嗜碱性 ,有嗜碱性颗粒。所有上皮的细胞质均可分泌中性糖和酸性糖共轭物 ,但呈色反应从黏膜表面上皮到腺体盲端逐渐减弱 ,黏膜表面上皮以分泌中性糖共轭物为主 ,而腺底部细胞以分泌酸性糖共轭物为主。在黏膜表面还附有一层很厚的混合糖共轭物。三个腺囊区的主要差异表现在第二室腺囊区面积最小 ,腺囊容积也最小 ,但腺囊数目最多 ,囊底黏膜褶丰富 ,黏膜层厚 ,腺体密集 ,深而密布的胃沟将黏膜分成无数小区 ,腺体中的亲银细胞丰富 ,明显多于前、后腺囊区 ,提示此区尚有分泌大量 5

The glandular regions of the glandular sac areas in bactrian camels were investigated by histological and histochemical methods. The structure and composition of secretory substances of the glandular regions in the three glandular sac areas are similar. The glands are distributed in the lamina propria and they are short straight simple tubes with a few branches. The luminal surface epitheliuem, gastric pit epithelium and glandular epitheluiem are consisted of columnar epithelium, which are mixed mucous cells secreting neutral and acid glycoconjugate. Neutral glycoconjugate is predominant in the luminal surface epithelium, while acid one mainly is in the basal glands. From the luminal surface epithelium to glandular end piece epithelium, the height of the cells gradully decreases and the positive reaction of PAS and AB weakens. There are a lots of mixed mucus substances on the mucosal membrane. In addition, the glandular sac area of the second compartment have some differences from ones of the first compartment. Their thick mucosal membrane are divided into numorous tiny regions by deep and rich gastric furrows. Many mucosal folds exist in the bottom of the glandular sacs. More argentaffin cells are distributed in the basal glandular epithelium. The result indicated that the glandular sacs have imporant function to secret a great deal of 5 HT.