Ultrastructural and cytochemical study of the kidney and nephridial gland cells of the marine prosobranch mollusc nucella lapillus (L.) in relation to function

摘要

There are three epithelial cell types over the dorsal wall folds of kidney of Nucella lapillus (L.). The most numerous, excretory cells, are unciliated columnar cells, characterised by the pres- Ence of a variety of large membrane-bound cytoplasmic vacuoles, some containing granular ma- Trial that gives a positive reaction for periodate-reactive carbohydrates. The second type, re- Sorptive cells, are usually cone-shaped ciliated cells, with a well-developed endocytotic canal System and numerous vesicles in their apical cytoplasm.