SUPPLIES

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(5) immune system

(4) antibacterial enzimes

(2) mucous

(1) layers of skins

The first line of defence is to keep the pathogen out. The body is like a fortress: the outer defences include our ................................... (1), ............................................ (2) from your nose and cilia, the ....................................... system (3), and .................................... (4) in tears - and acid in the stomach which kills most pathogens that enter our stomachs via our food The second line of defence kicks in if a pathogen does manage to get through via the normal openings or via a cut or graze. What happens is that our .................................... (5) attack the microbes in various ways - and usually manage to destroy them.

TEST