Where would you most likely find infectious agents? Check all that apply. in saliva
in mucus
on a door handle
on a water fountain
on a gene
in sewage
in animal waste

d. organisms have cells with different shapes and functions.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.