Respiratory epithelium
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Respiratory epithelium, or airway epithelium, is ciliated pseudostratified columnar epithelium a type of columnar epithelium found lining most of the respiratory tract as respiratory mucosa, where it
Cross-section of pseudostratified columnar epithelium
Second cross-section
Cilium
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The cilium is a short hair-like membrane protrusion from many types of eukaryotic cell. The cilium has the shape of a slender threadlike projection that extends from the surface of the much larger cel
Respiratory epithelium
…epithelium and finally to simple squamous epithelium in the alveolar ducts and alveoli. The cells in the respiratory epithelium are of five main types: a) ciliated cells, b) goblet cells, c) brush cells, d) airway basal cells, and e) small granule cells. Goblet cells become increasingly fewer further down the respiratory…
SEM micrograph of motile cilia projecting from respiratory epithelium in the trachea
Tracheal respiratory epithelium showing cilia and much smaller microvilli on non-ciliated cells in scanning electron micrograph
Scanning electron micrograph of nodal cilia on a mouse embryo