Electron microscopy of the tracheal ciliated mucosa in rat

On Flagellar Structure in Certain Flagellates

“…The subfibres are evidently tightly bound together, for there is no good evidence that they become separated by the techniques used to fragment flagella (reviewed in reference 14). As was first pointed out by Rhodin and Dalhamn (38), the fibres cannot consist of subfibres simply juxtaposed together because the central partition has the same thickness as the outer wall. On the basis of their study of fragmented flagella, Manton and Clarke (33) suggested that the fibres consist of subfibres bound together by a sheath.…”

“…Some basal bodies of rat tracheal cilia contain a single large granule (38). There is no evidence yet concerning the significance of these "granulecontaining" basal bodies.…”

“…In the flagellates we have examined, the cylinder is composed of nine triplet fibres, and it has the same composition in tracheal cilia (38), sea urchin sperm tails (1), the ciliate, Stentor polymorphus (Fig. 19 of reference 37), and the phytoflagellate, Chlamydomonas (Gibbons, unpublished observations).…”

“…In most cases that have been examined, the doublet fibres of the flagella and cilia are continuous with the triplets of the basal body (14,38,39), and it seems likely that the transition from triplet to doublet in these will be similar to that in flagellates. Amphibian and molluscan cilia, however, appear to have a different form of association between cilium and basal body, for here the doublet fibres end without entering the basal body (5,14).…”

Brush Cells of Rodent Gallbladder and Stomach Epithelia Express Neurofilaments

“…This same function was also assumed for the BCs of the epithelia of the gastrointestinal tract and their appendages in which, although intraepithelial nerve elements are missing, successive findings provided additional support that BCs may function as receptor cells (Luciano et al 1981(Luciano et al ,1993Reale 1990,1997;Kugler et al 1994). Even in earlier detailed descriptions after thin-section transmission electron microscopy (Luciano et al 1968;Luciano and Reale 1969), two main characteristics of BCs were evident: the prominent microvillous brush border (from which they received their name; Rhodin and Dalhamn 1956) and the architecture of the cytoskeleton. The three building elements F-actin, microtubules, and intermediate filaments are uncommonly abundant and display an extremely ordered spatial arrangement and distribution in the cytoplasm (Luciano and Reale 1997 (Kasper et al 1994).…”