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Sphincter of oddi is present at the opening of hepatopancreatic duct. Cystic duct is the duct of the gall bladder.Tongue is attached to the floor of the oral cavity by frenulum.Glisson's capsule is the connective tissue sheath around the hepatic lobule (functional unit of the liver).Serosa is the outermost layer (mesothelium) of the alimentary canal.