3d
agent
bacillus
bacteria
bacterium
biology
blood
body
caries
causative
cavity
cell
cellular
dental
electron
erythrocyte
germs
health
human
illness
illustration
infection
medical
microbe
microcosmos
microscope
organism
parasite
pathogen
rbc
red blood cell
schyzomycete
science
streptococcus
teeth
tonillitis
tooth
virus