Classification of epithelia

Classification of epithelia

1. simple

   • squamous
     • Location
     • functions:reduce friction, controls vessel permeability, absorption and secretion
   • cuboidal
     • location: glands, ducts, thyroid gland
     • function:secretion, absorption
   • columnar
     • stomach, intestines,gallblader, uterine tubes
     • pseudostratified ciliated columnar
       • location:nasal,cavity, trachea, bronchi
       • move mucus w/ cilia , protection

2. stratified

   • squamous
     • location: skin, mouth, throat, esophagus, rectum, anus and vagina
     • functions: phys.protec-n against abrasion, pathogen, chem.attack
   • cuboidal
     • lining of ducts
     • protec-n +secretion
   • columnar
     • epiglottis, anus, mammary glands, urethra
     • protec-n

3. transiotanal

   • urinary bladder, ureters, renal pelvis
   • expansion+recoil

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