EXCI 253 Lecture Notes - Lecture 3: Stratified Squamous Epithelium, Simple Squamous Epithelium, Basal Lamina
22 Sep 2016
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Name of collective epithelial tissue is epithelium. Secretion ex: inner lining of the esophagus produce mucous, synovium (freely movable joints) Avascular: no blood supply , no circulation directly to epithelial tissue, ex: cartilage too ( both connective tissues) It is close to tissues that get blood supply so that it survives. Usually has a free surface ex: alveoli , bladder, lungs, Basal layer: deepest layer close to the basement membrane. Pseudostratified: where it looks like it"s multiple layers but it"s actually 1 layer ex: nasal cavity and trachea. May be ciliated (helps with the filtration) Nonkeratinized sse (stratified squamous epithelium) found on wet surfaces subject to wear and tear. Stratified cuboidal epithelium and stratified columnar epithelium are rare class not responsible for. Wall of the bladder example: inner lining is transitional. Mixture of squamous and or cuboidal or columnar cells. Imagine the bladder filling up, bladder will get bigger as is the lining.
