ch4 tissues
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| tissues | a group of cells similar in structure that perform a common or related function
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| epithelial tissue | covering and lining tissue; ex digestive, urogenital, respiratory, outer skin. 2 fashions glands (glandular)
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| apical surface | an upper free surface exposed to eh body exterior or the cavity of an organ
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| basal surface | the lower attached part
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| basal lamina | thin supporting sheet, adjacent to the basal surface, consists of glycoproteins, selective filter to the epithelium, scaffolding to migrating cells for repair
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| basement membrane | formed by laminae, reinforces epithelial sheet, helps resist stretching and tearing and defines epithelial boundary
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| simple | single layer; absorption, secretion, and filtration
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| stratified | two or more
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| squamous | flattened and scale like
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| cuboidal | box like, as tall as they are wide
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| columnar | tall column shaped
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| simple squamous epithelium | flattened laterally, and cytoplasm is sparse; filtration, exchange of substance
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| endothelium | inner covering
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| mesothelium | middle covering
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| simple cuboital epithelium | single layer of cells as tall as they are wide, darkened round nuclei; secretion and absorption
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| simple columnar epithelium | single layer of tall close packed cells; absorption and secretion; have microvilli and goblet glands
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| pseudostratified columnar epithelium | single layer, differing height, false impression of many layers; secretes and absorbs, may have mucus secreting cells
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| stratified squamous epithelium | several layers, thick; protective role. basal are cuboital or columnar, apical is flattened
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| stratified cuboidal or columnar epithelium | two layers, rare, found in glands
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| transitional epithelium | resembles all but the surface is dome shaped usually, has the ability to stretch shape depends on stretch
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| gland | consist of one or more cells that make and secrete a particular product.
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| endocrine glands | produce hormones and eventually lose their ducts, hence ductless
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| exocrine glands | secret their products onto body surfaces or body cavities.
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Created by:
chasi
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