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Ultrastructure of the middle ear mucosa
The Annals of Otology, Rhinology, and Laryngology
|March 1, 1976
Summary
Middle ear epithelium is modified respiratory tissue featuring ciliated and secretory cells. Histologic studies indicate dark granules are precursors to light granules, not distinct secretory capacities.
Area of Science:
- Otolaryngology
- Histology
- Cell Biology
Background:
- Recent histologic studies confirm the middle ear epithelium's nature.
- This epithelium is a modified respiratory epithelium.
Purpose of the Study:
- To elucidate the nature of secretory granules in middle ear epithelium.
- To differentiate between dark and light secretory granules.
Main Methods:
- Histologic examination of middle ear tissue.
- Cellular analysis of ciliated and secretory cells, including goblet cells.
Main Results:
- Middle ear epithelium comprises ciliated cells and secretory cells, including goblet cells, all originating from basal cells.
- Secretory cells are filled with secretory granules.
- Postulation that dark granules are precursors to light granules, not indicative of different secretory capacities.
Conclusions:
- The middle ear epithelium is a specialized respiratory tissue.
- Secretory granules undergo a maturation process from dark to light stages.
- The subepithelial connective tissue layer is functionally significant alongside the epithelium.