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| uppermost row of cells adjacent to the passageway of the structure |
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| tissue to which the last row of ET cells are attached; a specialized type of extracellular material, is secreted by ET cells, helps to attach ET cells to underlying tissues |
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Definition
1. mechanically bind cells together
2. help form a permeability barrier
3. provide a mechanism for intercellular communication |
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| disk shaped structures with adhesive glycoproteins that bind cells to one another |
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| similar to 1/2 desmosome; attach ET cells to basement membrane |
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Definition
ZIPLOC BAGGY
hold cells together, form a permeability barries; consist of a zonula adherens & a zonula occludens |
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| is located between the cell membranes of adjacent cells & acts like a weak glue that holds cells together |
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Definition
| forms a permeability barrier, they prevent the passage of materials between cells; form a jigsaw arrangement to form a tight seal |
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| gap junction (end of CC's) |
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Definition
| a small protein channel that provides a means of intercellular communication by allowing the passage of ions & small molecules between cells |
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Definition
| secretory organ; most are comprised of ET cells with a supporting network of CT |
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| glands w ducts (passageways), ducts are lined with ET |
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| glands that have no ducts, their cellular products called hormones are secreted into the bloodstream |
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| water producing sweat glands; they secrete products with no loss of cellular material |
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| discharge fragments of the gland cells in the secretion; cell fragments pinch offl ex. milk producing mammary glands |
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Definition
| shed entire cells; entire cell becomes part of the secretion; ex sebaceous (oil) glands |
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