The presents natural and physical line of body defense which protects vulnerable tissue and underlying soft from pathogens. Skin again serves as a physical barrier and as body defense against different invading pathogens.
The skin has evolved with morphological features and helps to evade infections. For example, the sweat which is being secreted from sweat glands it has a large amount of salts and this sweat helps to attack any bacterial population includes removal of the uppermost dead-skin layer which removes microbes which are attached to it.
