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The hepatopancreatic duct guarded by a s...

The hepatopancreatic duct guarded by a sphincter called

A

Pyloric sphincter

B

Sphincter of Oddi

C

Sphincter of Boyden

D

Cardiac sphincter

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To answer the question about the sphincter that guards the hepatopancreatic duct, we can follow these steps: ### Step-by-Step Solution 1. **Understand the Question**: The question asks for the name of the sphincter that regulates the opening of the hepatopancreatic duct. 2. **Identify the Duct**: The hepatopancreatic duct is a structure that carries bile from the liver and gallbladder, and pancreatic juices from the pancreas into the duodenum (the first part of the small intestine). 3. **Consider the Options**: - **Pyloric Sphincter**: This sphincter is located between the stomach and the duodenum. It does not guard the hepatopancreatic duct. - **Sphincter of Oddi**: This sphincter controls the flow of bile and pancreatic juices into the duodenum from the hepatopancreatic duct. - **Sphincter of Boyden**: This term is often confused with the Sphincter of Oddi, but it is not a recognized sphincter in this context. - **Cardiac Sphincter**: This sphincter is located at the junction of the esophagus and stomach, preventing stomach contents from moving back into the esophagus. 4. **Evaluate the Correct Option**: Based on the functions of the sphincters: - The **Sphincter of Oddi** is the correct answer as it regulates the flow of bile and pancreatic juices into the duodenum through the hepatopancreatic duct. 5. **Conclusion**: The sphincter that guards the hepatopancreatic duct is the **Sphincter of Oddi**. ### Final Answer The hepatopancreatic duct is guarded by a sphincter called the **Sphincter of Oddi**.
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