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Anatomy of the chinchilla bulla and eustachian tube: I. Gross and microscopic study.

Abstract

The middle ear mucosa and eustachian tube of the normal chinchilla were studied quantitatively and under light microscopy to determine the distribution of each cell type of the lining epithelium and subepithelial gland. The middle ear mucosa consisted of columnar epithelium, cuboidal epithelium, and squamous epithelium. The lining epithelium of the eustachian tube was ciliated pseudostratified columnar epithelium. These epithelia were composed of ciliated, secretory, nonciliated (nonsecretory), and basal cells. The density of the ciliated cells was highest in the columnar epithelium area of the transitional zone of the middle ear mucosa. However, the density of the secretory cells was highest in the pharyngeal orifice of the eustachian tube. The nonciliated cell density was highest in the squamous epithelium area of the middle ear mucosa and decreased progressively toward the tympanic orifice of the eustachian tube. In the eustachian tube, the nonciliated cell density was highest in the pharyngeal portion of the eustachian tube, especially in the upper portion of the lateral wall. The subepithelial glands were tubuloacinar mixed glands composed of serous demilunes and mucous acini. The glands were localized primarily in the pharyngeal orifice and pharyngeal portion of the eustachian tube, and their ductal openings were present primarily in the inferior portion of the eustachian tube.

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  • Authors

    ,

    Source

    MeSH

    Animals
    Cell Count
    Chinchilla
    Ear, Middle
    Epithelial Cells
    Eustachian Tube
    Mucous Membrane
    Staining and Labeling

    Pub Type(s)

    Journal Article
    Research Support, U.S. Gov't, P.H.S.

    Language

    eng

    PubMed ID

    2441618

    Citation

    Hanamure, Y, and D J. Lim. "Anatomy of the Chinchilla Bulla and Eustachian Tube: I. Gross and Microscopic Study." American Journal of Otolaryngology, vol. 8, no. 3, 1987, pp. 127-43.
    Hanamure Y, Lim DJ. Anatomy of the chinchilla bulla and eustachian tube: I. Gross and microscopic study. Am J Otolaryngol. 1987;8(3):127-43.
    Hanamure, Y., & Lim, D. J. (1987). Anatomy of the chinchilla bulla and eustachian tube: I. Gross and microscopic study. American Journal of Otolaryngology, 8(3), pp. 127-43.
    Hanamure Y, Lim DJ. Anatomy of the Chinchilla Bulla and Eustachian Tube: I. Gross and Microscopic Study. Am J Otolaryngol. 1987;8(3):127-43. PubMed PMID: 2441618.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Anatomy of the chinchilla bulla and eustachian tube: I. Gross and microscopic study. AU - Hanamure,Y, AU - Lim,D J, PY - 1987/5/1/pubmed PY - 1987/5/1/medline PY - 1987/5/1/entrez SP - 127 EP - 43 JF - American journal of otolaryngology JO - Am J Otolaryngol VL - 8 IS - 3 N2 - The middle ear mucosa and eustachian tube of the normal chinchilla were studied quantitatively and under light microscopy to determine the distribution of each cell type of the lining epithelium and subepithelial gland. The middle ear mucosa consisted of columnar epithelium, cuboidal epithelium, and squamous epithelium. The lining epithelium of the eustachian tube was ciliated pseudostratified columnar epithelium. These epithelia were composed of ciliated, secretory, nonciliated (nonsecretory), and basal cells. The density of the ciliated cells was highest in the columnar epithelium area of the transitional zone of the middle ear mucosa. However, the density of the secretory cells was highest in the pharyngeal orifice of the eustachian tube. The nonciliated cell density was highest in the squamous epithelium area of the middle ear mucosa and decreased progressively toward the tympanic orifice of the eustachian tube. In the eustachian tube, the nonciliated cell density was highest in the pharyngeal portion of the eustachian tube, especially in the upper portion of the lateral wall. The subepithelial glands were tubuloacinar mixed glands composed of serous demilunes and mucous acini. The glands were localized primarily in the pharyngeal orifice and pharyngeal portion of the eustachian tube, and their ductal openings were present primarily in the inferior portion of the eustachian tube. SN - 0196-0709 UR - https://www.unboundmedicine.com/medline/citation/2441618/full_citation/Anatomy_of_the_chinchilla_bulla_and_eustachian_tube:_I_Gross_and_microscopic_study L2 - https://linkinghub.elsevier.com/retrieve/pii/S0196-0709(87)80035-2 DB - PRIME DP - Unbound Medicine ER -