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4.2 Epithelial Tissue – Anatomy & Physiology - Open Educational …
https://open.oregonstate.education/aandp/chapter/4-2-epithelial-tissue/
WebStructures found on some epithelial cells are an adaptation to specific functions. For example, cilia are extensions of the apical cell membrane that are supported by microtubules. These extensions beat in unison, allowing for the movement of fluids and particles along the surface.
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Apical–basal polarity and the control of epithelial form and
https://www.nature.com/articles/s41580-022-00465-y
WebApr 19, 2022 · In epithelia, the apical surface faces the external environment or lumen of the tissue and the basal surface faces the basement membrane. The apical surface often features specialized...
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Epithelial tissue: definition, functions & examples | Kenhub
https://www.kenhub.com/en/library/anatomy/overview-and-types-of-epithelial-tissue
WebNov 3, 2023 · Apical poles project towards the external surface or the lumen of an organ which epithelia cover, which is why they’re also called free surfaces or free domains. This pole may also show apical membrane specializations which alter the shape of this surface.
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Simple epithelium: Location, function, structure | Kenhub
https://www.kenhub.com/en/library/anatomy/simple-epithelium
WebSep 11, 2023 · The apical surfaces of these cells face the lumen and the opposite surface faces the basement membrane. The ovoid nuclei are usually placed towards basal surface. This type of epithelium is commonly adapted for secretion, absorption and protection.
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4.2 Epithelial Tissue - Anatomy and Physiology 2e | OpenStax
https://openstax.org/books/anatomy-and-physiology-2e/pages/4-2-epithelial-tissue
WebCertain organelles are segregated to the basal sides, whereas other organelles and extensions, such as cilia, when present, are on the apical surface. Cilia are microscopic extensions of the apical cell membrane that are supported by microtubules.
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Role of membrane traffic in the generation of epithelial cell
https://www.nature.com/articles/ncb2635
WebThe apical surface forms a critical interface between the extracellular milieu and underlying tissues and faces the lumen of sac- and tube-shaped organs and glands, or lines the inner surfaces...
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Epithelial Histology - University of Washington
https://courses.washington.edu/pbio375/epithelial-histology/epithelial-histology.html
WebEpithelia are comprised almost entirely of cells. The apical surface faces the lumen (inside of a hollow organ) while the basal or basolateral surface is adjacent to the underlying tissue. In many epithelia, the apical surface is specialized.
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7.3: Epithelial Tissue - Biology LibreTexts
https://bio.libretexts.org/Courses/Lumen_Learning/Anatomy_and_Physiology_I_(Lumen)/07%3A_Module_5-_The_Tissue_Level_of_Organization/7.03%3A_Epithelial_Tissue
WebJul 30, 2022 · Certain organelles are segregated to the basal sides, whereas other organelles and extensions, such as cilia, when present, are on the apical surface. Cilia are microscopic extensions of the apical cell membrane that are supported by microtubules.
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Role of Polarity Proteins in the Generation and Organization of Apical
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5587363/
WebThe apical surface of epithelial cells, which lines the lumen of sac- and tube-shaped organs and the inner surfaces of the body cavities, forms the interface between the extracellular milieu and underlying tissues. It has numerous functions, including absorption and secretion, immunological surveillance, sensory transduction, and barrier formation.
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Emergence of an apical epithelial cell surface in vivo - PMC
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4735878/
WebJan 1, 2016 · Radial intercalation is a complex process which, at a minimum, requires the nascent cell to 1) define an apical-basal axis and assign apical identity; 2) move apically and separate the basolateral surfaces of overlying cells in the epithelium; 3) make contact with the lumen by penetrating the tight junctions of the epithelium; 4) remodel those j...
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