泥螺肝胰腺细胞的超微结构和功能

利用透射电镜技术研究了泥螺(Bullactaexarata)肝胰腺细胞的超微结构。结果表明,泥螺的肝胰腺主要由4类细胞构成:泡状细胞(B细胞)、吸收细胞(R细胞)、纤维细胞(F细胞)和胚细胞(E细胞)。B细胞大,长柱状,胞质中有许多消化泡;R细胞的脂滴数量多,体积大,具少量的线粒体;F细胞含有极丰富的粗面内质网、线粒体等结构,但脂滴的数量远远少于R细胞。E细胞为多边形,核大而圆,粗面内质网少,线粒体小而狭长。根据这4种细胞的超微结构特点,指出了泥螺肝胰腺的功能,并探讨了肝胰腺细胞的分化序列。

Ultrastructure and function of the hepatopancreas of Bullacta exarata

The ultrastructure of the hepatopancreas of Bullacta exarata was studied through electronic microscopy.The result shows that the hepatopancreas of B.exarata are composed of four types of cells in the wall of tubules:the embryonic cell(E-cell),resorptive cell(R-cell),fibrillar cell(F-cell),and blister cell(B-cell).B-cell contains numerous digestive vesicle.R-cell.demonstrates a marked increase in lipid droplet size and number over F-cell.The F-cell has more rough sndoplasmic reticulum,mitochondria and free ribosomes.E-cell are polyhedral.The cytoplasm contains relatively sparse rough endoplasmic reticulum,small mitochondria.The ultrastructures of these cells were given and their functions were discussed.The differentiation sequences of hepatopancreas were suggested in this paper.