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simple epithelium with cuboidal shaped cells that lines various glands with a secretory function, for example in salivary glands.
a clear, colourless, odourless and tasteless liquid that can also occur as a gas (water vapour)...
meristem that produces a layer of bark on the outer surface of a plant.
the discharge of heated water directly into rivers, lakes or the sea, usually from power plants...
the form in which carbon dioxide is transported in red blood cells.