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Group of similar cells and their intercellular substance; similar origin in embryo; function together to perform specialized activity.
Epithelial (Classification & Function)
Cover body surfaces; lines body cavities & ducts; form glands.
Epithelial tissues consist of...
Largely or entirely of closely packed cells with little or no intercellular material between adjacent cells.
Epithelial tissues are arranged in...
Continuous sheets - nerves may extend through sheets, but blood vessels do not (avascular).
One layer; some layers do not reach surface; multi-layered (stratified) appearance; columnar epithelial tissue.
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