AN ELECTRON MICROSCOPICAL STUDY ON THE CILIARY APPARATUS OF HUMAN MAXILLARY SINUS

Investigation of the ultra structure on the ciliary apparatus of human maxillary sinus was made, by the electron microscopy in thin sections, with the following results.The structure of the cilia resemble that seen in human oviduct or other materials, however, the central fibers of the cilium may appear to terminate at the plane of the basal ring through which they seem to be joined together with the peripheral fibers, which are continuous with the shell of the basal body.A small dense body is frequently observed in the internal cavity of the basal body. When examined in transverse sections, it is commonly limited in appearance to the center of the lumen of the basal body; this fact may suggests that in longitudinal sections the appearance proves to be the axial section of the ciliary apparatus.A knob-like process is almost horizontally projected into the cytoplasm from the midportion of the shell of the basal body. All the processes may be uniform in their direction through all the ciliary apparatus on the epithelium.The shell of the basal bodies gives rise to the rootlet fibers showing a cone in their deriving shape; the nearer the position in this deriving come towards lower end of the basal bodies, greater is the most amount of the rootlet fibers. The proximal end of the basal bodies often is enclosed by the rootlet fibers which present the periodic structure.The fine fibers (probably the so-called fine rootlet fibers), which are random in their direction and disposition, were observed in the cytoplasm.The ciliary apparatus with the two bandles of the rootlet fibers in the human oviduct as described recently by a worker (1960) were not observed.