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→Physical Barriers
*** A break in the skin: e.g. wounds
*** A break in the skin: e.g. wounds
'''''Mucus Membranes'''''
'''''Mucous Membranes'''''
* Thin epithelial surfaces are necessary for the normal physiological functions of the body's mucus membranes (ie absorption and gas exchange).They are therefore more susceptible to infection
* Thin epithelial surfaces are necessary for the normal physiological functions of the body's mucus membranes (ie absorption and gas exchange).They are therefore more susceptible to infection
** The body uses alternative protective mechanisms in these areas:
** The body uses alternative protective mechanisms in these areas: