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The term pseudostratified is derived from the appearance of this epithelium in the section which conveys the erroneous (pseudo means almost or approaching) impression that there is more than one layer of cells, when in fact this is a true simple epithelium since all the cells rest on the basement membrane. The nuclei of these cells, however ...
These are simple columnar epithelial cells whose nuclei appear at different heights, giving the misleading (hence "pseudo") impression that the epithelium is stratified when the cells are viewed in cross section. Ciliated pseudostratified epithelial cells have cilia. Cilia are capable of energy-dependent pulsatile beating in a certain direction ...
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 (NDES) [6] Goblet cells become increasingly fewer further down the respiratory tree until they are absent in the terminal bronchioles; club cells take over their role to some extent here. [7]
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
The neural tube begins as a single layer of pseudostratified epithelial cells, but rapid proliferation of neuroepithelial cells creates additional layers and eventually three distinct regions of growth. [2] [4] As these additional layers form the apical-basal polarity must be downregulated. [3]
They are lined with respiratory epithelium, which is classified as ciliated pseudostratified columnar epithelium. [7] The epithelium in the main bronchi contains goblet cells , which are glandular , modified simple columnar epithelial cells that produce mucins , the main component of mucus.
Analogous to neural glial cells, the supporting cells are non-neural cells in the olfactory epithelium that are located in the apical layer of the pseudostratified ciliated columnar epithelium. There are two types of supporting cells in the olfactory epithelium: sustentacular cells and microvillar cells. The sustentacular cells function as ...
The transitional epithelium usually appears cuboidal when relaxed and squamous when stretched. [1] This tissue consists of multiple layers of epithelial cells which can contract and expand in order to adapt to the degree of distension needed. Transitional epithelium lines the organs of the urinary system and is known here as urothelium (pl ...