Epithelial cell types of the primary ureter of Helix aspersa: Ultrastructural and cytochemical characteristics

The present study describes the morphological characteristics which determine the structural polarity of the principal and ciliated cells in the primary ureter epithelium of Helix aspersa. These characteristics are analysed on the basis of the function performed by both cell types. The presence of paniculate glycogen and the location of glycoconjugates associated with cell membranes of the epithelial cells is revealed by the method of Thiéry.