Stratified Epithelial Tissues definitions Flashcards
Stratified Epithelial Tissues definitions
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Stratified EpitheliumTissue with multiple layers of cells, providing protection and not all cells contact the basement membrane.Squamous CellsFlat, squished cells found at the apical surface of stratified squamous epithelium, providing protection.KeratinA tough, waterproof protein found in keratinized stratified squamous epithelium, enhancing protection.Transitional EpitheliumStratified tissue with cells that change shape from cuboidal to squamous, found in the urinary system.Cuboidal CellsCube-shaped cells found at the apical surface of stratified cuboidal epithelium, aiding in protection and secretion.Columnar CellsTall, narrow cells found at the apical surface of stratified columnar epithelium, providing protection and limited absorption.Basement MembraneA thin layer separating epithelial tissue from underlying connective tissue, providing support.Apical SurfaceThe topmost layer of cells in epithelial tissue, exposed to the external environment or internal space.Keratinized EpitheliumStratified squamous epithelium containing keratin, found in dry areas like skin.Unkeratinized EpitheliumStratified squamous epithelium without keratin, found in moist areas like the mouth and esophagus.UrotheliumAnother term for transitional epithelium, specifically found in the urinary system.Goblet CellsCells that may be present in stratified columnar epithelium, secreting mucus.ElasticityThe ability of transitional epithelium to stretch and return to its original shape, crucial for bladder function.DesmosomesStructures that hold epithelial cells together, maintaining tissue integrity during stretching.Tight JunctionsCell connections in epithelial tissue that prevent leakage of molecules between cells.