The sphincter of B-oyden surrounds the-

Options

A. Opening of the bile duct before it is jointed with the pancreatic duct
B. Opening of the hepatopancreatic ampulla into the duodenum
C. Opening of the pancreatic duct into the hcpatogen creatic ampulla
D. Opening of the accessory pancreatic duct into the duodenum

Answer

**Step-by-Step Solution:**

1. **Understanding the Anatomy:**
- The sphincter of Boyden is associated with the opening of the bile duct in the digestive system. To understand its function, we need to know the anatomy of the biliary system and the pancreas.

2. **Identifying the Ducts:**
- The liver produces bile, which is transported via the hepatic duct. The cystic duct connects the gallbladder to the hepatic duct, forming the common bile duct when they merge.

3. **Pancreatic Duct:**
- The pancreatic duct carries digestive enzymes from the pancreas. It joins the common bile duct before entering the duodenum (the first part of the small intestine).

4. **Hepatopancreatic Duct:**
- The combined duct formed by the common bile duct and the pancreatic duct is known as the hepatopancreatic duct. This duct opens into the duodenum.

5. **Ampulla of Vater:**
- The opening of the hepatopancreatic duct into the duodenum forms a structure called the ampulla of Vater, which is significant for the release of bile and pancreatic juices into the digestive tract.

6. **Role of Sphincter of Boyden:**
- The sphincter of Boyden surrounds the opening of the bile duct before it joins the pancreatic duct. It regulates the flow of bile into the duodenum.

7. **Conclusion:**
- Therefore, the sphincter of Boyden surrounds the opening of the bile duct before it merges with the pancreatic duct.

**Final Answer:**
The sphincter of Boyden surrounds the opening of the bile duct before it is joined with the pancreatic duct.

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