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Pancreas The pancreas secretes digestive enzymes into the duodenum, the first segment of the small intestine. These enzymes break down protein, fats, and carbohydrates. The pancreas also makes insulin, secreting it directly into the bloodstream. Insulin is the chief hormone for metabolizing sugar.
Digestive System Functions & Organs for the... 1  Digestive System I: The Upper Gastrointestinal Tract 9:09. 2  Digestive System II: The Lower Gastrointestinal Tract 6:54. 3  Anatomy and Physiology of the Mouth 6:50. 4  Anatomy of the Throat and Esophagus 8:29. 5  Physiology of the Stomach and Gastric Juices 8:17.