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Epithelium tissue


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Epithelium tissue

  1. 1. By: Steph , Lindsey, Kerri, Sam, Steffi, and Katie
  2. 2.  Count the layers  Simple: 1 layer  Stratified: looks and is several layers  Pseudostratified / Transitional: Looks like several layers, but all the cells contact the basement membrane What cell is on the top layer?  Squamous: Flat (scaly)  Cuboidal: about as wide as it is tall  Columnar: much taller than it is wide
  3. 3.  Singlelayer of thin squamous cells resting on a basement membrane Location:  Air sac of lungs  Forms the walls of capillaries  Forms serous membranes  Membranes that lines the ventral body cavity and cavity and covers the organs inside it
  4. 4. This shows singlelayers ofsquamous (flat)cells around theair spaces(alveoli) of thelung.
  5. 5.  Location  Common in glands and their ducts  Forms walls of kidney tubules  Covers surface of ovaries • A cluster of ducts in the pancreas • Top layer of the cell is as wide as it is thick
  6. 6.  Location  Line entire length of the digestive track from stomach to anus Located in digestive tract
  7. 7.  Nonciliated type in male’s sperm-carrying ducts of large glands; ciliated variety lines the trachea, most of the upper respiratory tract
  8. 8. 1.Cilia2.Mucus of gobletcell3.Pseudostratifiedepithelium layer 4.(under three)Basementmembrane 5.(under four)connective tissue
  9. 9.  Nonkeratinized type forms the moist linings of the esophagus and mouth; keratinized variety forms the epidermis of the skin, a dry membrane.
  10. 10. Little black dotsnuclei, mid-sectionstratified squamousepithelium, right belowthat basementmembrane, lastlyconnective tissue
  11. 11.  Lines the ureters, bladder, and part of the urethra Top pinkish purple is the transitional epithelium, and then the lighter purple is the basement membrane, then connective tissue
  12. 12. Impetigo
  13. 13. a superficial skin infection characterized by pustules and caused by either Staphylococci or Streptococci.
  14. 14. pustule Staphylococc i Streptococ ci
  15. 15. pustuleStratified Squamous Epithelium Cross section of skin
  16. 16. • Inflammatory, chronically relapsing, non-contagious and itchy skin disorder• Type of eczema• Also known as "prurigo Besnier," "neurodermitis," "endogenous eczema," "flexural eczema," "infantile eczema," and "prurigo diathésique
  17. 17.  Cause is genetic Aggravated by contact or intake of allergens Also influenced by other factors affecting the immune system  Ex. stress and fatigue
  18. 18.  Idiopathic- no certain cause Changes in at least 3 groups of genes encoding structural proteins, epidermal proteases and protease inhibitors may lead to a defective epidermal barrier
  19. 19.  can’t keep in moisture can’t keep out irritants disturbs the formation of natural skin oils reduces sweat secretion skin can become so dry that it cracks and fissures develop  allowing bacteria and irritants to penetrate the skin  possibly cause infection