Define the Digestive System Secretions.
(Secretion, site of production, and Function)
Saliva: (mouth) contributes to starch digestion, lubrication, swallowing.
Mucus: (mouth, stomach, small intestine, pancreas) Protects GI tract cells, lubricates digesting food.
Enzymes: (mouth, stomach, small intestine, pancreas) Promotes digestion of carb., fats, & protein into forms small enough for absorption.
Acid (HCL): (stomach) Promotes digestion of proten, destroys microorganisms, increases solubility of minerals.
Bile: (Liver) Aids in fat digestion.
Bicarbonate: (pancreas, small intestine) Neutralizes stomach acid when it reaches small intestine.
Hormones: (stomach, small intestine) Regulates digestion & absorption.