Abstract
The ultrastructure of fine filamentous components was examined with TEM in the subepithelial connective tissue of the ampulla. These filaments varied in width from lOnm to 15 nm. In cross sections at high magnification, each filament had the shape of a polygon and consisted of some electron-dense spherules. These morphological findings suggested that they appeared to be identical to so-called microfibrils. The fibrils distributed sparser in deeper layer of the connective tissue. Sometimes, bundles of the filaments were oriented perpendicularly to the basement membrane. It seemed that they anchor the epithelium to the connective tissue.
