CHP5 Histology

Secretion movement of eggembryo absorption in uterine

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Unformatted text preview: ecretory vesicles); microvilli & cilia in some organs; inner lining of stomach, intestines, gallbladder, uterus, uterine tubes; some kidney tubules tubules • Absorption & secretion, movement of egg/embryo Absorption in uterine tube, secretion of mucus in Stratified epithelia Stratified Table 5.2~ Pseudostratified columnar epi- llooks multi-layered but all ooks cells @ basement membrane cells • Goblet cells & cilia common; respiratory Goblet tract from nasal cavity-bronchi, male reproductive tract reproductive • Secretes & propels mucus Table 5.3~ Stratified columnar is rare, located where 2 other epi types meet, such as pharynx, larynx, anal canal, male urethra meet, Stratified squamous most widespread, deepest layer has cuboidal-columnar shaped cells that continually undergo mitosis mitosis Stratified epithelia (cont.) Stratified Stratified squamous (cont.)~ • Daughter cells push upward, becoming flatter…eventually die/slough-off die/slough-off • Exfoliation (desquamation)= sep. of cells from surface • Pap smear examines exfoliated cells for uterine cancer • Keratinized epi= dead compact cells @ skin surface; cells dead packed w/ keratin (protein) & coated w/ H2O repellent packed repellent • Resists abrasion & penetration of pathogens, H2O loss • Nonkeratinized epi= tongue, oral mucosa, esphagous, tongue, vagina, other internal mem’s vagina, • Resists abrasion & penetration of pathogens, remains moist & slippery to help resist abrasion Stratified epithelia (cont.) Stratified Table 5.3~ Stratified squamous epi- (keratinized) multi-layered w/ cells increasingly flattened towards surface • Dead cells @ surface w/o nuclei; epidermis (palms & soles thickest) Strat squam epi- (nonkeratinized) lacks surface layer of dead (thickened) cells • Tongue, oral mucosa, esophagus, anal canal, vagina Stratified cuboidal epi- sweat gland ducts, follicles (ovaries), seminiferous tubules (testes) • Sweat & hormone secretion, sperm production Transitional epi- surface cells ‘round’, ~5-6 layers thick (relaxed) & ~2-3 stretched; urinary tract • Stretches to fill u.t. Connective tissue Connective Connective= mostly fibers & ground substance, w/ widely mostly separated cells separated • Most abundant & widely disturbed tissue type • Connects organs together, serves to support, bind Connects (tendons/ligaments/fat/etc.), & protect organs (immune & physical); movement, storage, heat production, & transport (blood) (blood) 5 types= fibrous tissue, fat (adipose), cartilage, bone, blood types= • Mesenchyme (embryonic c.t.) develops into 3 forms= Mesenchyme fibrous c.t.; supportive c.t. (cartilage & bone); & fluid c.t. (blood) (blood) Fibrous c.t. (‘connective tissue proper’)- contains fibers, cells, & ground substance cells, • 3 types of fibers= collagenous, reticular, elastic Fibrous tissues Fibrous Collagenous- collagen (protein); tough/flexible, resists collagen stretching stretching • Most abundant protein, 25% body’s protein (gelatin, leather, Most glue) glue) • Tendons, ligaments, & dermis…matrix of car...
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