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27199B

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Image #   27199B
Name:   Adenoid / Nasopharynx - epithelial surface
Copyright:   Copyright 2007 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Adenoid / Nasopharynx surface. Seen here are: squamous nasal epithelial cells, a ciliated nasal epithelial cell and an M cell (lymphoepithelium). The nasopharynx (nasal part of the pharynx) lies behind the nose and above the level of the soft palate. Stratified squamous nasal epithelial cells line the surface of the nasopharynx (tightly packed together in this image). The epithelial cell surfaces are covered with tiny microvilli that increase the cell surface area. The microvilli likey aid in localization of foreign debris (coming from the nose) and detection by immune cells. Mucus, secreted by cells in the epithelial lining (not seen), traps foreign objects, such as bacteria, preventing them from entering the lungs. Near the center of the image is a ciliated nasal epithelial cell (they occur throughout the nasal lining). They have hair-like structures known as cilia. Coordinated, wave-like beating of the cilia propels the mucus to the back of the pharynx, where it is swallowed, thus removing foreign debris. An M-cell is seen to the right of the ciliated nasal epithelial cell. The M-cell is part of the lymphoepithelium and aids in transporting foreign antigens to the underlying lymphoid follicles. Other sensory cells / features (not seen) also occur in the nasal epithelial layer.
Magnification*: x1,200
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   27199B medical epithelium adenoid epithelium adenoid nasal epithelium cilia microvilli sinus nasal nasal epithelial cell 07.01.07 adenoids nasopharynx pharyngeal nasopharyngeal pharyrnx upper airway mucosa lymphoid follicles airway cilium ciliated ciliated epithelium ciliated epithelia epithelia human body mucosa nasal mucosal epithelium nasal mucosal epithelia nasal mucosa epithelium nasal mucosa epithelia nose olfaction respiratory tract sense smell epithelial hair hairs mucous lining olfactory sense nasal cavity lining lymphoepithelium lymphoepithelia M-cell M-cells M cell M cells squamous nasal epithelial cell squamous nasal epithelial cells squamous nasal epithelium squamous nasal epithelia nasal epithelia nasal epithelium cell nasal epithelia cell ciliated nasal epithelial cell ciliated nasal epithelial cells ciliated nasal epithelia ciliated nasal epithelium ciliated nasal cell ciliated nasal cells squamous cell squamous cells lymph tissue hair like hair-like nasal passage nasal passageway air passage airway passage mucosal vaccine mucosal vaccines foreign debris pathogen pathogens antigen antigens nasal epithelial layer nasal epithelial lining olfactory mucosa olfactory senses mucus mucous mucus secreting cell mucus secreting cells mucus-secreting cell mucus-secreting cells mucilage mucilanginous sensory cell sensory cells chemosensory cell chemosensory cells SEM microvillus nasal cell nasal cells pseudostratified epithelia pseudostratified epithelium upper airway

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