What role does the stomach, pancreas and duodenum play in the human body?

1. Digestion and absorption The

stomach, pancreas and duodenum are digestive organs of the human body. They can decompose carbohydrates, fats and proteins in food into small molecules and inhale them into the body to supplement energy and nutrition.

2. Secretion Function

The stomach secretes gastric acid, pepsin, gastrin and other substances; the pancreas secretes pancreatic protease, lipase, amylase and other substances; the duodenum secretes an alkaline digestive fluid, which can participate in the digestion and absorption of food.

3. Immune function

The gastric acid component in the stomach can kill pathogenic bacteria in food and prevent pathogen invasion. The duodenal mucosa contains a variety of immune cells, which are also an important part of intestinal immunity.