abstract
antivirus
artery
attack
bacteria
biological
biology
blood
cancer
cardiovascular
cell
cholesterol
close
clot
core
electron
epidemic
erythrocyte
flow
genetic
glow
hiv
human
ill
illness
illustration
infection
life
light
micro
microbe
microbiology
microscope
microscopic
organ
oxygen
patient
plaque
plasma
render
rendered
scientific
scifi
sick
sickness
stroke
system
test
vein
vital