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Ciliated pseudostratified columnar epithelium is the type of respiratory epithelium found in the linings of the trachea as well as upper respiratory tract, which allows filtering and humidification of incoming air. [1] Non-ciliated pseudostratified columnar epithelia are located in the prostate [2] and membranous part of male vas deferens.
Pseudostratified columnar, ciliated: respiratory epithelium: respiratory: larynx - true vocal cords: Stratified squamous, non-keratinized - respiratory: trachea: Pseudostratified columnar, ciliated: respiratory epithelium: respiratory bronchi Pseudostratified columnar, ciliated respiratory terminal bronchioles Simple cuboidal, ciliated respiratory
Stratified columnar epithelium is rare but is found in lobar ducts in the salivary glands, the eye, the pharynx, and sex organs. This consists of a layer of cells resting on at least one other layer of epithelial cells, which can be squamous, cuboidal, or columnar. Pseudostratified
Histologically, these cells are classified as pseudostratified columnar cells. [ 1 ] After recruitment from the ectoderm, the neuroectoderm undergoes three stages of development: transformation into the neural plate , transformation into the neural groove (with associated neural folds ), and transformation into the neural tube .
The nasopharynx is lined by respiratory epithelium that is pseudostratified, columnar, and ciliated. Polyps or mucus can obstruct the nasopharynx, as can congestion due to an upper respiratory infection. The auditory tube, which connects the middle ear to the pharynx, opens into the nasopharynx at the pharyngeal opening of the auditory tube ...
Conchae are composed of pseudostratified columnar, ciliated respiratory epithelium with a thick, vascular, and erectile glandular tissue layer. [4] The conchae are located laterally in the nasal cavities, curling medially and downward into the nasal airway. Each pair is composed of one concha in either side of the nasal cavity, divided by the ...
Their epithelium can be simple cuboidal or simple columnar. [10] Striated ducts are part of the intralobular ducts. They are found in the submandibular gland, [11] [12] sublingual duct, and the parotid gland, but are more developed in the parotid gland. [13] They are not present in pancreas.
One example of pathological irritation is cigarette smoke, which causes the mucus-secreting ciliated pseudostratified columnar respiratory epithelial cells that line the airways to be replaced by stratified squamous epithelium, or a stone in the bile duct that causes the replacement of the secretory columnar epithelium with stratified squamous ...