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Epithelial tissues are found throughout the body and have many diverse roles that are typically associated with absorption, protection and secretion. Epithelial tissues are recognisable since they rest on a thin delicate basement membrane (Figure 1.8).

Figure 1.8 Some of the major epithelial tissues

Epithelial tissues can be broadly split into the simple epithelia, which consist of a single layer of cells, and the stratified epithelia, which consist of multiple layers of cells stacked one on top of the other like bricks in a wall.