“…The opinion of the urothel regenerating itself through mitosis in the basal cell layer [20] has been rejected by Schreibf.r el at. [24], The authors have proven mitosis to exist in all layers of the epithel and in the cover cell layer -a find which agrees with our own light microscopical observations.…”
Using scanning-beam electron microscopy, rabbit’s bladder shows a folding of the mucous membrane and a regular arrangement of the cover cells being connected by intercellular junctions. The possible functions of intercellular junctions and intercellular spaces are discussed. Surface changes in experimental coli cystitis are illustrated, described, and interpreted. These changes disturb the anti-infectious principles (antibacterial and mechanical factor) of the bladder, thus favoring the development and continuity of the infection.
“…The opinion of the urothel regenerating itself through mitosis in the basal cell layer [20] has been rejected by Schreibf.r el at. [24], The authors have proven mitosis to exist in all layers of the epithel and in the cover cell layer -a find which agrees with our own light microscopical observations.…”
Using scanning-beam electron microscopy, rabbit’s bladder shows a folding of the mucous membrane and a regular arrangement of the cover cells being connected by intercellular junctions. The possible functions of intercellular junctions and intercellular spaces are discussed. Surface changes in experimental coli cystitis are illustrated, described, and interpreted. These changes disturb the anti-infectious principles (antibacterial and mechanical factor) of the bladder, thus favoring the development and continuity of the infection.
“…It has been emphasized, on the basis of light and TEM studies of urinary bladders from a number of species, including man (9,19) that transitional epi thelium is pseudostratified, inasmuch as all the cells of tlte epithelium retain their anchorage to the basal membrane by means of cytoplasmic processes. If the three dimensional-like pictures of the relief, as obtained by SEM, of the fracture surface through the epithelium are studied then such an anchorage appears doubtful, at least in man.…”
51 biopsies from healthy and diseased epithelium from human urinary bladders were examined by scanning electron microscopy. The luminal surface of the cover cells was marked by microvilli and microplicae. The replacement of the cover cells takes place by simple desquamination. This exposes cover cells having numerous microvilli, and these later develop characteristic microplicae. The ability to form cover cells is lost by the transitional epithelium following tumour formation. No tumour-specific surface morphology was observed.
“…la-c, 2, 4 Mehrkernige Zellen im Übergangsepi thel sind von verschiedenen Autoren beob achtet worden [Martin, 1962[Martin, , 1972Petry und Amon, 1966;Hicks, 1975], jedoch scheint ihre Entstehung noch unklar zu sein [Bargmann, 1978]. Es ist nicht auszuschliessen, dass es sich in einigen Fällen, in denen zweikernige Zellen beschrieben wurden, um stark gelappte oder gefaltete Zellkerne han delt, die bei entsprechender Schnittlage als zwei getrennte Kerne erscheinen [vgl.…”
Section: Befundeunclassified
“…Die von verschiedenen Autoren [Martin, 1962;Tanaka, 1962;Petry und Amon, 1966;Hicks, 1975;Teutsch, 1975] in den letzten Jahren erarbeiteten Er gebnisse über den histologischen Aufbau des Uber gangsepithels sind allerdings widersprüchlich, und es stellt sich erneut die Frage nach der Mehrreihigkeit bzw. der Mehrschichtigkeit des Ubergangsepithels.…”
The structure of the transitional epithelium of pig, sheep, rat and shrew was examined by ultrathin serial sections. The epithelium consists of basal, intermediate and superficial cells. The epithelia of all four species are stratified and are distinguished by a different number of intermediate cell layers.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.