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Epithelium

UCI SOM Robertson

QuestionAnswer
Mesothelium epithelium of body cavities
Endothelium epithelium of cardiovascular system
Parenchyma functional part of gland (made of epithelium)
Stroma supportiv/structural part of gland (made of epithelium)
7 fxns of epithelium protection, absorption, excretion, surface transport, digestion, lubrication, special (hair cells of ear; taste cells; ova, sperm)
types of epithelium squamous, cuboidal, columnar, pseudostratified, transitional; keratinized or not
simple squamous attribute and example rapid movement across epithelium; villi of lungs, capillaries
simple cuboidal attribute and example ion pumps, secretory cells; kidney
simple columnar attribute and example secretory or absorptive cells; small intestine
stratified squamous attribute and example protection; 2 types-dry and wet; keratinized-epidermis; nonkeratinized-vagina, esophagus
stratified cuboidal attribute and example rare; in ducts of sweat glands
stratified columnar attribute and example rare; found at jxns between stratified squamous and simple columnar
pseudostratified attribute and example all the cells have their basal on the basal membrane; trachea, bronchi, epididymis
transitional attribute and example number and shape of layers appear to vary, depending on distention; urinary bladder
4 modes of glandular secretion merocrine (only secretory product is released); apocrine (small amounts of cytoplams are released as well), holocrine (entire cell is secreted), endocrine (secretory product is released in extracellular space rather than free epithelial surface)
carcinoma cancer (neoplasm) of epithelial tissue
adenocarcinoma cancer of glandular epithelial tissue
differences in carcinomas increased mobility of cells, variable size of nuclei, nuclei intensely stained, cells less polarized, groups of cells less organized, cells lack intercellular jxns, move across basement membrane, and more obvious ones
Created by: droid
 

 



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