<prompt> Aoic hiatus containsLeft gastric vein and thoracic ductThoracic duct and hemiazygos veinAzygos vein and thoracic ductLeft vagus and thoracic duct  <response>: The aoic opening is osseoaponeurotic.It lies at the lower border of the 12 th thoracic veebra.It transmits Aoa,Thoracic duct and Azygos vein. REF.B D Chaurasias human anatomy,Vol 2,Fifth edition.Pg 337 