<prompt> Valve of heister is seen in -Cystic ductCommon bile ductCommon hepatic ductPancreatic duct  <response>: Ans. is a- i.e., Cystic duct o The mucous membrane of the cystic duct forms a series of 5-12 crescentic folds, arranged spirally to form the so called spiral valve of Heister. This is not a true valve.o This question is a direct repeat from NBE based AI-2013 