Which part of body secretes the hormone secretin?

Options

A. Stomach
B. Oesophagus
C. Lleum
D. Duodenum

Explanation

To determine which part of the body secretes the hormone secretin, we can follow these steps:

1. **Understand what secretin is**: Secretin is a hormone that plays a crucial role in the digestive process, particularly in regulating the pH of the small intestine.

2. **Identify the source of secretion**: Secretin is secreted by the intestinal mucosa, which is the innermost layer of the intestinal wall.

3. **Locate the specific part of the intestine**: Secretin is primarily secreted by the mucosa of the duodenum, which is the first part of the small intestine that receives chyme from the stomach.

4. **Review the options provided**: The options given are stomach, esophagus, ileum, and duodenum.

5. **Select the correct option**: Since secretin is secreted by the intestinal mucosa of the duodenum, the correct answer is the duodenum.

Thus, the final answer is that the hormone secretin is secreted by the **duodenum**.

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