Skin - largest organ acts as a primary defense , Tears  - has lysozyme to wash out pathogens, Phagocytes are - engulf pathogens, HCl - too acidic that germs can not survive, Cilia in nose - help sneezing to clear out indaver to the body, Diarrhoea - a way body gets rid of pathogens, Bacteria flora - help elimination of bad pathogens,

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