Ptyalin is an enzyme in this bodily fluid that helps break down starches
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enzyme called pepsin to aid the digestion of protein-rich foods like... [DOC] [TLE] Medical Physiology/Gastrointestinal Physiology/Secretions ... [PAR] About 9 liters of fluid pass through the GI system each day, and only about 2 liters 
... Digestive enzymes are secreted by glandular cells which will store the ....