fighting disease

the bodys non specific defence systems:

skin acts as a barrier to pathogens, secretes antimicrobial substances to kill pathogens

hair and mucus in nose traps particles that could hold pathogens

trachea and bronchi secretes mucus to trap pathogens

trachea and bronchi lined with cilia which are hair like structures that waft mucus up to the throat where it can be swallowed

stomach produces hydrochloric acid which kills pathogens 

the immune system:

white blood cells travel around…