Aoic hiatus contains
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 Chaurasia's human anatomy,Vol 2,Fifth edition.Pg 337
Left gastric vein and thoracic duct
Thoracic duct and hemiazygos vein
Azygos vein and thoracic duct
Left vagus and thoracic duct
Thorax