Digestive System Secretions
(secretion/ site of production/function)
Saliva, Mucus, Enzymes, Acid (HCL), Bile, Bicarbonate, Hormones.
Saliva (mouth): contributes to starch digestion.
Mucus (mouth, stomach, small/large intestine): Promotes GI tract cells, lubricates digesting food.
Enzymes (mouth, stomach small intestine, pancreas): Promotes digestion of carbs, fats, and protein into forms small enough for absorption.
Acid (stomach): promotes digestion of protein, destroys microorganisms, increases solubility of minerals.
Bile (liver, stored in gallbladder): Aids in fat digestion (emulsifies fat)
Bicarbonate (pancreas, small intestine): neutralizes stomach acid when it reaches small intestine.
Hormones (stomach, small intestine): regulates digestion and absorption.