ORL
Original Paper
Morphological Distribution of Middle-Ear Epithelium in the Wistar Rat: A Functional HypothesisScarano E.a · Paludetti G.a · Frusoni F.a · Deli R.b · Maurizi M.aaInstitute of Otolaryngology and bInstitute of Odontostomatology, Catholic University of the Sacred Heart, Rome, Italy
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Article / Publication Details
Received: November 16, 1995
Accepted: October 09, 1996
Published online: January 13, 2010
Issue release date: 1997
Number of Print Pages: 4
Number of Figures: 0
Number of Tables: 0
ISSN: 0301-1569 (Print)
eISSN: 1423-0275 (Online)
For additional information: https://www.karger.com/ORL
Abstract
The authors studied the overall microscopical anatomy of the middle ear and of the eustachian tube in 20 tympanic bullae of 10 Wistar rats. Large hexagonal epithelial flat cells covered the roof of the bulla, the two upper thirds of both lateral walls, the upper half of the eustachian tube, and the upper third of the tympanic orifice; ciliated and secretory cells lined the inferior thirds of both walls of the bulla while a ciliated epithelium with strong cilia, all directed towards the tubal orifice, located on the floor of the tympanic cavity together with groups of non-ciliated cells was detectable near the tubal and antral areas and on the floor of the eustachian tube. Non-ciliated cells covered by microvilli were found near the pharyngeal orifice. These observations seem to demonstrate the following: (1) the ciliated elements present a well-defined topographic distribution; (2) a preferential pathway for mucociliary clearance made up of strong ciliated cells located on the floor of the bulla is clearly detectable, and (3) the roof of the bulla seems to be mainly involved in the ventilatory function.
© 1997 S. Karger AG, Basel
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Article / Publication Details
Received: November 16, 1995
Accepted: October 09, 1996
Published online: January 13, 2010
Issue release date: 1997
Number of Print Pages: 4
Number of Figures: 0
Number of Tables: 0
ISSN: 0301-1569 (Print)
eISSN: 1423-0275 (Online)
For additional information: https://www.karger.com/ORL
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