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Introduction to aperio/epithelium lecture

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Discuss the location, structure, and function of the basement membrane.   location - under epithelium. Structure - fusion of basal lamina with reticular lamina. Function - Anchor epithelium to loose CT underneath  
Apical and basal surfaces   Apical = top, basal = bottom  
simple squamous epithelium   rapid diffusion. Capillaries, alveoli, glomeruli  
simple cuboidal epithelium   secretion and absorption. surface of ovaries, lining of nephrons, walls of renal tubules, parts of the eyes and thyroid  
Simple columnar epithelium   move mucus and other substances. stomach, small intestine, uterus  
microvilli   increase surface area for absorption, secretion  
goblet cells   secrete mucin (mucus). Glandular simple columnar ET  
Cilia   beat to move stuff. Found in trachea, fallopian tubes  
stratified cuboidal ET   cuboidally shaped in multiple layers. Protect ducts of sweat glands, mammary glands, and salivary glands  
stratified columnar ET   secretion and protection. ocular conjunctiva of the eye, parts of pharynx and anus, uterus, urethra and vas deferens  
stratified squamous nonkeratinized ET   kept moist by body secretions. cornea, oral cavity, vagina, internal portion of lips, esophagus, anal canal  
stratified squamous keratinized ET   protected from abrasion by keratin, and kept hydrated and protected from dehydration by glycolipids produced in stratum granulosum. Skin, tongue, external lips  
pseudostratified columnar ciliated ET   secretion or absorption. trachea, upper respiratory tract  
transitional epithelium   deal with changes in volume of fluid. Bladder, ureters, superior urethra, gland ducts of prostate.  


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