Epithelial tissues by 8rk0Jk

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									Simple Squamous Epithelium




                 Absorption

                 Secretion

                 Filtration
Simple Cuboidal
  Epithelium
   Glands, ducts
   Walls of the kidney
    tubules
   Surface of the ovaries
Simple Columnar Epithelium




           Goblet cells secrete
           mucus that aids in the
           function of respiratory
           system
pseudostratified columnar
ex. goblet cells, respiratory




                All the cells rest on the
                 basement membrane
                Since some of the cells are
                 shorter then others, the nuclei
                 appear at different heights
     Stratified Squamous
    (keratinized and non-
         keratinized)
   Stratified Squamous Epithelium:
    Most common stratified
    epithelium in the body
   Squamous at the free edge and
    columnar or cuboidal at the
    basement membrane
   Sites of abuse or friction:
    esophagus, mouth and outer
    portion of the skin, the outer
    surface of skin is keratinized
    (surface cells contain keratin, a
    tough protective protein)
Keratinized vs. Nonkeratinized
Stratified Cuboidal
          Stratified Cuboidal
           and Columnar
           Epithelium usually
           just two cell layers
          Fairly rare in the
           body; mainly ducts
           of large glands
            Sweat glands
            Mammary glands
Transitional
Epithelium




                  highly modified stratified
                   squamous: urinary bladder,
                   ureters, urethra.
                  All these organs are part of
                   the urinary system and are
                   subject to considerable
                   stretching

								
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