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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Epithelial tissue |
A sheet of cells that cover a body surface or lines a body cavity |
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Covering and lining epithelium |
Forms outer layer of skin. dips into and lines the open cavities of urogenital, digestive and respiratory system. covers and the walls and organs of the closed ventral body cavity |
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Glandular epithelium |
Fashions the glands of the body |
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Apical surface |
An upper free surface exposed to the body exterior or the cavity of an internal organ |
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Basal surface |
Lower attached surface to all epithelia |
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Microvilli |
Finger like extensions of the plasma membrane, increase exposed surface area |
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Cilia |
Tiny hairlike projections that propel substances along free surfaces |
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Basal lamina |
Adjacent to the basal surface; noncellular adhesive sheet acts as elective filter, determines which molecules diffusing are allowed to enter epithelium |
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Reticular lamina |
Layer of extracellular material containing a fine network of collagen protein fibers that belong to underlying conncetive tissue |
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Basement membrane |
Reinforces the epithelial sheet, helps it resist stretching and tearing, defines epithelial boundary |
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Simple epithelia |
Consist of single cell layer, found where absorption, secretion, and filtration occur |
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Stratified epithelia |
Composed of two or more cell layers, skin surface and lining of mouth |
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Squamous cells |
Flattened and scale like |
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Cuboidal cells |
Boxlike, as tall as wide |
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Columnar cells |
Are tall column shaped |
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Simple squamous epithelium |
Allows materials to pass by diffusion and filtration in sites where protection is not important, secretes lubricating substances in serosae |
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Simple cuboidal epithelium |
Secretion and absorption |
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Simple columnar epithelium |
Absorption; secretion of mucus, enzymes, and other substances |
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Pseudostratified columnar epithelium |
Secrete substances |
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Stratified squamous epithelium |
Protects underlying tissues in areas subjected to abrasion |
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Transitional epithelium |
Stretches readily, permits stored urine to distend urinary organ |
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