杂色鲍外套膜的微细结构及其功能分析

In this paper, the fine structure of Mantle of Haliotis divericolor was observed under light, scanning and transmission electron microscopes, and the mantle's functions were analysed. The results showed that the Mantle of Haliotis divericolor is composed of (inner and outer)marginal epithelium and central connective tissue. The marginal epithelium is simple columnar epithelium consists of five cell types: general columnar cell and four types of secretory cells (which always named goblet cell under light microscope). In TEM section, general columnar cell is much higher than wide, and with nucleus near center; secretory cell are not very high, and with nucleus near basement membrane, secretory granules in the plasma near free surface. Among secretory cells, typeⅠwith secretory granules of inhomogeneous lamina, typeⅡwith secretory granules of electron-dense and electron-loosen mixed structure, type Ⅲ with secretory granules of electron-loosen homogeneous material，type Ⅳ with secretory granules of electron-dense material. In central connective tissue, there are hematococoel, rhogocytes (pore cells), muscle fibers, collagen fibrils and nerve fibers, besides still some macrophages, mast cells and other histiocytes. according to the fine structure, the functions of the mantle are shell production, different part contributes different, otherwise, the mantle takes part in respiration and immunity.