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28 Cards in this Set
- Front
- Back
Tissues
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groups of similar cells and extracellular products that carry out a common function, such as providing protection or facilitating body movement
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Histoloy
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study of tissues and their relationships within organs
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Four principle types of tissues in the body
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Epithelial, Connective, Muscle, and Nervous
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Three primary germ layers are
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Ectoderm, Mesoderm, and endoderm
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Epithelial Tissue
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lines every body surface and all body cavities
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Basement Membrane
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thin extracellular layer between the epithelium and the underlying connective tissue
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Basal Lamina
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contains collagen fibers as well as protein and carbohydrate macromolecules that are secreted by the cells of the epithelium
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Simple Epithelium
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one cell layer thick, and all of these epithelial cells are in direct contact with the basement membrane
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Stratified Epithelium
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two or more cell layers thick; only the deepest layer directly attaches to the basement membrane
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Pseudostratified Epithelium
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layered; cells nuclei are distributed at different levels between the apical and basal surfaces. Attached to basement membrane, although some do not reach its apical surface
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Squamous Cells
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flat, wide, and somewhat irregular in shape
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Cuboidal Cells
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about as tall as they are wide. Are not perfect cubes because edges are rounded
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Columnar Cells
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slender and taller than they are wide. look like a hexagon
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Simple Squamous Epithelium
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one layer of flattened, tightly bound cells
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Endothelium
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epithelium that lines the lumen of the blood and lymphatic vessels and that heart and its chambers
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Mesothelium
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simple squamous epithelium that lines the internal walls of the pericardial, pleural, and peritoneal cavities as well as external surfaces of the visceral organs of the cavities
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Simple Cuboidal Epithelium
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one layer of tightly bound, cube-shaped cells
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Simple Columnar Epithelium
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one layer of tightly bound, tall shaped cells
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Stratified Squamous Epithelium
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Many layers thick; cells in outer layers are dead, flat, and contain keratin. In nonkeratinized they are alive, flat, and moist
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Stratified Cuboidal Epithelium
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Two or more layers of cells; apical layer of cells is cube-shaped
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Stratified Columnar
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two or more layers of cells;cells in apical layer are columnar-shaped
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Pseudostratified Columnar Epithelium
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one layer of cells of varying heights; all cells attach to basement membrane; ciliated form contains cilia and goblet cells; nonciliated form lacks cilia and goblet cells
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Transitional Epithelium
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multiple layers of cuboidal and rounded cells, or flattened cells; some cells may be binucleated
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Glands
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individual cells or multicellular organs composed predominantly of epithelial tissue
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Endocrine Glands
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lack ducts and secrete their products directly into the interstitial fluid and bloodstream
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Exocrine Glands
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originate from an invagination of epithelium that burrows into deeper connective tissues. these glands usually maintain their contract with epithelial surface by means of a duct
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Duct
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an epithelium-lined tube through which secretions of the gland are discharged onto the epithelial surface
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Multicelluar Exocrine Glands may be classified according to three criteria:
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form and structure, type of secretion, or method of secretion
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