皱纹盘鲍肠粘膜上皮的结构和功能  

STRUCTURE AND FUNCTION OF MUCOUS EPITHELIUM OF THE INTESTINE IN HALIOTIS DISCUS HANNAI

作　　者：崔龙波[1] 刘传琳[1] 刘迅[1] 陆瑶华[1] 

机构地区：[1]烟台大学生化系,山东烟台264005

出　　处：《动物学报》2001年第3期324-328,T001,共6页ACTA ZOOLOGICA SINICA

基　　金：国家自然科学基金资助项目 (No .3 9470 3 5 1)&&

摘　　要：以透射电镜和扫描电镜观察、组织化学及酶活性测定等方法研究了皱纹盘鲍的肠和直肠。肠和直肠粘膜上皮由 5种细胞组成。具微绒毛的柱状细胞呈现吸收细胞的超微结构特征 ,纤毛柱状细胞参与运输食物颗粒和粪便 ,Ⅰ型腺细胞具蛋白酶、非特异性酯酶和脂酶活性 ,以顶浆分泌形式分泌消化酶 ,Ⅱ型腺细胞分泌物可能与包裹粪便有关 ,杯状细胞分泌酸性粘多糖。体外酶活性分析表明肠和直肠粘膜上皮分别具有 4种和 3种植物多糖酶。Disk ablone (Haliotis discus hannai Ino) is one of the important marine cultivated species in North China. Brown algae and red algae are the chief foods of disk abalone. They can also swallow small animals. Adopting to their food habit, they have a very long digestive tract. It's about 3 times longer than their bodies. In previous years, studies on the digestion of disk abalone were mostly concentrated to the roles of the digestive glands and those of the digestive tract has been neglected. In this paper the intestine and the rectum of Haliotis discus hannai Ino were studied with TEM and SEM observations, histochemical methods and tests for some enzymatic activities. The intestine can be evenly divided into anterior, meddle and posteriov. The epithelia of the intestine and the rectum are composed of 5 types of cells: (1) The cells with microvilli were the main cell type in the mid and prointestine. Their free borders were closely aggregated of microvilli. They were 2 0 μm long and 0 1 μm in diameter. Under the cell membrane there were many pinocytic vesicles. On the top of the cell there were a lot of mitochondria and multivesicular bodies. In the middle of the cell some secondary lysosomes and many lipid drops of different size were found. In the postintestine at the basal part of the cells, the cell membrane went inward, deeply into the cell to form some finger like protrusions. Among them, there were many mitochondria. Some nerves could be seen between the cell membrane and the basal membrane. (2) Ciliated cells' structures were similar to those of the microvilli cells. Instead of microvilli, the free border of the cell was aggregated of cilia. The basal bodies and the ciliary rootlets could be seen clearly. There were a lot of mitochondria among the rootlets. Ciliated cell was the main cell type in the prointestine, typhlosoles of intestine groove and rectum. (3)Gland cells Ⅰ were distributed in the intestine. Its amount increased from the beginning to the end. There was only a small amount in

关 键 词：皱纹盘鲍 肠 直肠 结构 功能 酶 消化生理 

分 类 号：Q954[生物学—动物学]