4. What are some functions of
the epithelium?

Gap-fill exercise

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The epithelial tissues perform
covering, impermeability protection
against the , for example,
in skin, resorption, as the guts
and tubules, gas exchange,
example, the amphibian , thermal
regulation, like , secretion of
substances, in the epithelium
glands. In some the skin also
the important function
camouflage and mimicry .