Ptyalin is an enzyme in this bodily fluid that helps break down starches
These waves of narrowing push the food and fluid in front of them 
through ... contains an enzyme called ptyalin that begins to digest the starch from 
food... [DOC] [TLE] Lab #12: Digestive Physiology [PAR] importance of the stable core body temperatures of humans ... digestive enzymes 
to break down food at near maximal ... the next.