<Tr> <Th> Artery </Th> <Td> oesophageal arteries </Td> </Tr> <Tr> <Th> Vein </Th> <Td> oesophageal veins </Td> </Tr> <Tr> <Th> Nerve </Th> <Td> Sympathetic trunk, vagus </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr>

Function of the upper and lower esophageal sphincter muscles