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16 Cards in this Set
- Front
- Back
Epithelial tissue
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covers body surfaces, lines body cavities, hollow organs, ducts; and form glands
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Connective tissue
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protects and supports the body and its organs-binds organs together stores energy and reserves as fat, provides immunity
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muscle tissue
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movement
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nervous tissue
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initiates and transmits nerve impulses to help coordinate body activities
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avascular
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blood vessels are located adjacent to connective tissue
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Function of Epithelial tissue
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protection, secretion, absorption, excretion, sensory reception, reproduction
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Simple Squamous
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-thinness allows for active passive movement of substances
-allows diffusion of respiratory gases -ex: lungs heart kidney |
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Simple Cuboidal
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-produces body secretions; sweat and enzymes
-important in the secretion of substances (such as tears and saliva) and absorption |
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Simple non ciliated Columnar
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contain micro-villi and goblet cells
-micro-villi are finger like projections that serve to increase surface area of plasma membrane causing greater absorption -goblet cells modified columnar secrete mucous -lines the inside of stomach and small intestines |
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Simple ciliated columnar
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-protect underlying tissues
-specialized for absorption and secretion -move mucous secreted by goblet cells -respiratory track->move foreign particles toward throat were it could be swallowed or spit out |
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Transitional epithelium
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-cell shape depends on whether relaxed or distended
-function is to help prevent rupture of an organ -range in shape from flat squamous to columnar;as a result of distention expansion or movemnt in body part ex: bladder |
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Stratified Squamous
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-surface layer is flat while deeper layers vary from cuboidal to columnar
-bottom repeats by cell division -new cells move outward and loose blood supply-dehydrated -two forms keritinized and non keritinized keratinized-tough layer of keratin deposited in surface cells(keratin is a protein that protects the skin from invasion by microbes, injury and also waterproofs) ex: outer layer of skin non-keratinized-remain moist ex:mouth tongue |
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stratified cuboidal
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rare
main function is protection ex: ducts of adult sweat glands |
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stratified columnar
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uncommon
funtion is protection and secretion ex:lines part of urethra |
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pseudo stratisfied columnar
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-function as secretion
-covering and lining epithelium -nuclei are at varying depths -all cells are attatched to basement membrane -some cells do not reach the surface -the cells that reach the surface have cilia ex:respiratory tract |
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glandular epithelium
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-functions as secretion
-gland can consist of one cell or a group of highly specialized epithelial cells -classified as endocryine or exocrine exocrine-exits sweat mucous oil -secrete products into ducts -empty at the surface of covering and lining endocrine- hormones ENter extracellular fluid and diffuse into blood -ex: adrenaline |