A sphincter muscle is NOT present between whi | vedclass

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Question

(D) The gastro-oesophageal sphincter regulates the opening of the oesophagus into the stomach.The pyloric sphincter regulates the opening of the stoma

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Pharynx and oesophagus

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(D) The gastro-oesophageal sphincter regulates the opening of the oesophagus into the stomach.The pyloric sphincter regulates the opening of the stomach into the duodenum.The sphincter of Oddi guards the opening of the hepato-pancreatic duct into the duodenum.There is no specific sphincter muscle present between the pharynx and the oesophagus; the upper oesophageal sphincter is a physiological structure,but it is not typically classified as a distinct anatomical sphincter muscle in the same manner as the others listed.

$A$ sphincter muscle is $NOT$ present between which of the following?

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