Epithelia are the linings of ____ and external surfaces and body cavities, including ____ (tubes or channels) carrying secretions from glands. They may be ____ of several layers of cells, called ‘compound (stratified) epithelia’, or just a single layer known as ____ epithelia’. The lowest or ____ layer of cells is attached to a basement membrane for ____ and connection. Part of the basement membrane is secreted by the ____ cells. There are nerve supplies to epithelia but they are supplied with ____ and nutrients from deeper tissues by diffusion. As they are surface tissues and exposed to friction, their capacity for growth and repair is greater than other tissues and usually occurs during sleep.

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