Describe 2 ways the body prevents the entry of microorganisms.

• acid in stomach kills pathogens in food• skin forms a barrier / produces antimicrobial secretions• hairs in the nose trap (particles which may contain) pathogens• trachea / bronchi has mucus which traps pathogens or bronchi have cilia which waft mucus to throat to be swallowed

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Answered by Fiona C. Biology tutor

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