Epithelial cell
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The document discusses the different types of epithelial tissues, including squamous, cuboidal, columnar, and pseudostratified epithelia. It describes the structure, function, location, and adaptations of each type. The key types discussed are simple squamous, stratified squamous, simple cuboidal, stratified cuboidal, simple columnar, pseudostratified columnar epithelia. The document provides detailed information on the histology and characteristics of each epithelial tissue.
Epithelial cell
- 1. Epithelial cellPresent by: M.Nafly(HND in Biomedical scientist)* Nafly Hussain*
- 2. Epithelial cellPseudostratified columnarStratified squamousSimple squamousSimple cuboidalStratified columnarSimple columnar* Nafly Hussain*
- 3. Epithelial cellStratified Epithelial cellStratified Squamous
- 5. Pseudo Stratified ColumnarSimple Epithelial cellSimple Squamous
- 7. Simple Columnar* Nafly Hussain*
- 8. Squamous EpitheliaStratified SquamousEpitheliaSimple SquamousEpithelia* Nafly Hussain*
- 9. Squamous Epithelia:Structure Simple Squamous Epitheliaconsist of a single layer of flattened cells and it has a nucleus. It’s shape is rather like crazy paving. Stratified Squamous Epithelia has many layers of flattened cells.* Nafly Hussain*
- 10. Squamous Epithelia: FunctionSimple Squamous EpitheliaIt protects line passageways cavity and cover the pleura, pericardium and peritoneum.Stratified Squamous EpitheliaThis epithelium protects underlying layer and repair itself rapidly if damaged . Outer layer of the cell may be keratinized on dry surface such as skin. * Nafly Hussain*
- 11. Squamous Epithelia Located places Simple Squamous Epithelia Lining the heart
- 12. Blood vessels
- 13. Lung alveoli
- 14. Body cavitiesStratified Squamous Epithelia Lining the mouth
- 15. Cervix and virgina* Nafly Hussain*
- 16. Blood vessels* Nafly Hussain*
- 17. Lining the mouth* Nafly Hussain*
- 18. Simple Squamous EpitheliaApical surfaceNucleusBasal surfaceStratified Squamous EpitheliaApical surfaceNucleusBasal surface* Nafly Hussain*
- 19. Squamous Epithelia AdaptationThis epithelial cells either impervious or semipermiable depending on the tissueOuter layer of the cell may be keratinized on dry surface such as skin.* Nafly Hussain*
- 20. * Nafly Hussain*
- 21. Cuboidal Epithelium* Nafly Hussain*
- 22. Structure of cuboidal epitheliaCharacteristics : Roughly square in shape.
- 23. Each cell has a spherical nucleus in the centre.
- 24. Cells lie on basement membrane.
- 25. Tightly packed with little or no-inter cellular substance.* Nafly Hussain*
- 27. Single layer Arpical surfaceCytoplasmNucleasBasal laminaConnective tissue* Nafly Hussain*
- 28. Found in :* Nafly Hussain*
- 29. Simple cuboidal : Kidney Tubules* Nafly Hussain*
- 30. Stratefied Cuboidal: Sweat gland* Nafly Hussain*
- 31. Simple Cuboidal: FunctionProvide a layer of protection from :abrasionforeign particlesinvading bacteriaexcessive water loss to the underlying tissue* Nafly Hussain*
- 32. Function and Adaptation* Nafly Hussain*
- 33. Kidney tubules* Nafly Hussain*
- 34. Function and Adaptation* Nafly Hussain*
- 35. Respiratory bronchioles* Nafly Hussain*
- 36. Function and adaptation* Nafly Hussain*
- 37. Ovarian surface* Nafly Hussain*
- 38. Stratefied Cuboidal: FunctionThey protect the sweat glands, salivary glands and mammary glands.They aid in sweat secretion.They help in sperm production.They also aid in secretion of ovarian hormones.* Nafly Hussain*
- 39. * Nafly Hussain*
- 40. Columnar Epithelia* Nafly Hussain*
- 41. Columnar EpitheliaPseudostratifiedColumnarSimple Columnar* Nafly Hussain*
- 42. StructurePseudostratified ColumnarAll cells rest on the basement membrane but all cells do not reach the lumen.Thenuclei are found at different levels.Only a single layer of cells. but looks multilayered.Has its cell nuclei positioned in a manner suggestive of stratified. Simple ColumnarUni-layeredThe height of the cells may vary.Cells are elongated and column shaped.Characteristically their nuclei are also elongated and usually located near the base of cells. and at right angles to the base.The cells are longer than their width.* Nafly Hussain*
- 43. FunctionsSimple Columnar EpitheliumThe main function is protection.For example, the epithelium in the stomach and digestive tract provides an impermeable barrier against any bacteria that could be ingested but is permeable to any necessary ions .Simple columnar epithelial cells can specialize to secret mucus that coats and protects the surrounding surface from damage.simple columnar epithelium is also specialized to provide sensory input.simple columnar epithelium are very good at absorbing and transporting nutrients from locations like the small intestine . * Nafly Hussain*
- 44. Pseudo stratified Columnar Epithelium.Pseudo stratified ciliated epithelium lines the nasal cavities, trachea, and bronchi. Its function is to protect these structures, secrete mucus by goblet cells, and move mucus by cilia.
- 45. Trap and move "pollutants" to the mouth where they are swallowed.
- 46. Secretes and propels mucus by ciliary actions.
- 47. Has an absorptive function. * Nafly Hussain*
- 48. * Nafly Hussain*
- 49. LocationSimple ColumnarSites where chief function is – protection Eg. ducts of glands bronchiolesSites where cells can both secrete and absorb.Small intestine• Sites where the cells are specialized to secrete - surface lining of stomachcervical canal.Uterine tube* Nafly Hussain*
- 50. EyesEarsBuccal cavityDigestive tractReproductive organs* Nafly Hussain*
- 51. LocationPseudo stratified Columnarrespiratory tract from nasal cavity to bronchiportions of male urethra.* Nafly Hussain*
- 52. Simple EpitheliumApical surfaceColumnar cell cytoplasmTight junctionsOther junctions, such as adherens or desmosomesNucleusBasement membrane basal surfaceBasal surface* Nafly Hussain*
- 53. Pseudo stratified Epithelium* Nafly Hussain*
- 54. AdaptationsSimple columnar.Cilia found on the luminal surface.Goblet cells within columnar cells.Microvilli specialized for absorption.* Nafly Hussain*
- 55. AdaptationsPseudostratified columnar.Ciliated in the respiratory system.
- 56. Has large microvilli or stereocilia onthe surface,in the male genital system. * Nafly Hussain*