<Tr> <Th> Latin </Th> <Td> Ampulla hepatopancreatica, ampulla Vaterii </Td> </Tr> <Tr> <Th> MeSH </Th> <Td> A03. 159.183. 079.300. 950 </Td> </Tr> <Tr> <Th> Dorlands / Elsevier </Th> <Td> 12127886 </Td> </Tr> <Tr> <Th> TA </Th> <Td> A05. 8.02. 017 </Td> </Tr>

Which of the following guards the opening of hepatopancreatic duct into the duodenum