Where does hepatopancreatic duct open

Options

A. Ileum
B. Duodenum
C. Jejunum
D. Junction of duodenum with jejunum

Answer

To answer the question "Where does the hepatopancreatic duct open?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Small Intestine**:
- The small intestine is divided into three main parts: the duodenum, jejunum, and ileum.

2. **Identify the Role of the Duodenum**:
- The duodenum is the first part of the small intestine and is responsible for receiving partially digested food from the stomach. It plays a crucial role in digestion and nutrient absorption.

3. **Learn About the Hepatopancreatic Duct**:
- The hepatopancreatic duct, also known as the ampulla of Vater, is formed by the fusion of the pancreatic duct and the bile duct.

4. **Function of the Hepatopancreatic Duct**:
- This duct is responsible for transporting digestive enzymes and bicarbonate from the pancreas to the small intestine, specifically to the duodenum.

5. **Determine the Opening of the Hepatopancreatic Duct**:
- Since the hepatopancreatic duct delivers its contents to the small intestine, and specifically connects with the duodenum, we conclude that the hepatopancreatic duct opens into the duodenum.

6. **Select the Correct Answer**:
- From the options provided (ileum, duodenum, jejunum, or junction of duodenum and jejunum), the correct answer is **duodenum**.

### Final Answer:
The hepatopancreatic duct opens into the **duodenum**.

---