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An aggregation of cells that are similar in structure and function.
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Tissue
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The scientific study of tissues.
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Histology
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Covers surfaces of the body and internal organs, line cativities, and form glands.
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Epithelial Tissues
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Attaches the tissue to underlying connective tissue.
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Basement Membrane
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Tissues that consist of a single layer of cells.
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Simple Epithelia
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Single layered.
Cells that are thin and flat and appear as irregular polygons in surface view.
*Arteries, veins, and capillaries.
*Lining of blood vessels.
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Simple Squamous
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Single layered.
Cells that are block-like in cross section and hexagonal in a surface view.
*Kidney tubules.
*Secretory epithelium in the pancreas.
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Simple Cuboidal
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Single layered.
Cells that are elongated and appear polygonal on their free surfaces.
Two types!
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Simple Columnar
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Cells that secrete mucus, which flows over the surfaces of adjacent cells and protects the tissue.
*Simple Columnar!
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Goblet Cells
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Lines the uterine tubes and small bronchi of the lungs.
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Ciliated Columnar Epithelium
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Lines the digestive tract from stomach to anus.
*Single layer of elongate cells without cilia.
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Nonciliated Columnar Epithelium
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Increases the absorptive surface area of the cells.
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Microvilli
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Tissues that consist of two or more layers of cells.
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Stratified Epithelia
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*Multilayered; outer layer of thin, flat cells.
*Oral cavity and epidermis.
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Stratified Squamous
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Multilayered.
The shape of the surface cells is cubelike or round.
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Stratified Cuboidal
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