pseudostratified epithelium


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pseudostratified epithelium

[¦sü·dō′strad·ə‚fīd ‚ep·ə′thē·lē·əm]
(histology)
A type of epithelium in which all cells reach to the basement membrane but some extend toward the surface only part way, while others reach the surface.
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Vesicular gland showing loose connective tissue septa (CT), secretory alveoli (A) with secretion, thick arrowhead pseudostratified epithelium showing type A cells and thin arrowhead basal cells of pre-pubertal bull.
Compactly arranged tubules with well-organized pseudostratified epithelium and lumen filled with spermatozoa were surrounded by connective tissue without visible signs of inflammation.
Histologically, the lesion has a fibromuscular wall that is lined by cuboidal epithelium, although, rarely, lesions may be lined with pseudostratified epithelium and cilia.
A second layer of pseudostratified epithelium developed from mesenchymal cells along the basal lamina of the ectodermally derived pseudostratified epithelium.