amoeba
bacterium
biology
cartoon
cell
character
contractile
cute
cytoplasm
danger
dangerous
department
emergency
fighter
fire
firefighter
firefighters
firefighting
fireman
firemen
helmet
icon
illustration
kawaii
mascot
membrane
micro
microbe
microbiology
microorganism
microscopic
nucleus
organism
protection
protective
protozoa
pseudopod
rescue
rescuer
safety
science
security
simple
sticker
structure
symbol
unicellular
uniforms
urgency
vacuole