'Ptyalin is an enzyme in this bodily fluid that helps break down starches'
saliva
BODILY FLUIDS: Ptyalin is an enzyme in this bodily fluid that helps break down starches
Ptyalin is an enzyme in this bodily fluid that helps break down starches
Ptyalin is an enzyme in this bodily fluid that helps break down starches
BODILY FLUIDS
saliva
BODILY FLUIDS