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ch4 tissues

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