Types: Columnar (simple, stratified) - Cuboidal (simple, stratified) - Pseudostratified/Respiratory - Squamous (simple, stratified) - Transitional - Olfactory eMedicine is an online clinical medical knowledge base that was founded in 1996. ... A thin section of lung tissue stained with hematoxylin and eosin. ... Types of epithelium This article discusses the epithelium as it relates to animal anatomy. ... Columnar epithelia are cells whose heights are at least twice their width. ... The simple epithelium is made up of one layer of cells that have little resistance to injury. ... Stratified columnar epithelia have several layers, with columnar cells as the outermost of these. ... Simple cuboidal eplithelia are cells in a single layer found on the surface of ovaries, the lining of nephrons, and parts of the eye and thyroid. ... Stratified cuboidal epithelia are multi-layered. ... Transverse section of trachea. ... The squamous epithelium is epithelium consisting of one or more cell layers, the most superficial of which is composed of flat, scalelike or platelike cells. ... In simple squamous epithelia all the cells are in contact with the basal lamina (basement membrane) of the epithelium. ... H&E stain of biopsy of normal esophagus showing the stratified squamous cell epithelium Section of the human esophagus. ... Transitional epithelia are multi-layered cells that can contract and expand. ... The olfactory epithelium is a specialized epithelial tissue inside the nasal cavity that is involved in smell. ...

Features: Lateral/cell-cell: Tight junction - Adherens junction - Desmosome - Gap junction Basal/cell-matrix: Basal lamina - Hemidesmosome - Focal adhesion Apical: Cilia - Microvilli - Stereocilia A cell junction is a structure within a tissue of a multicellular organism. ... Diagram of Tight junction. ... Principal interactions of structural proteins at cadherin-based adherens junction. ... Cell adhesion in desmosomes A desmosome (also known as macula adherens (Latin for adhering spot ) is a cell structure specialized for cell-to-cell adhesion. ... A gap junction is a junction between certain animal/plant cell-types that allows different molecules and ions to pass freely between cells. ... A cell junction is a structure within a tissue of a multicellular organism. ... The basal lamina (often erroneously called basement membrane) is a layer on which epithelium sits. ... Hemidesmosomes (HD) are very small stud- or rivet-like structures on the inner basal surface of keratinocytes in the epidermis of skin. ... Immunofluorescence coloration of actin (green) and the focal adhesion protein vinculin (red) in a fibroblast. ... cross-section of two motile cilia, showing the 9+2 structure A cilium (plural cilia) or undulipodium (pl. ... The microvilli (singular: microvillus) are structures that increase the surface area of cells by approximately 600 fold (human), thus facilitating absorption and secretion. ... Stereocilia are mechanosensing organelles of hair cells, which respond to fluid motion or fluid pressure changes in numerous types of animals for various functions, primarily hearing. ...