<prompt> Structures passing through the aortic hiatus of diaphragm area Aortab Azygos veinc Hemiazygos veind Thoracic ducte Sympathetic trunkacdabdabcab  <response>: Aortic opening- Level- T12- At osseoaponeurosis between right and left crus- Structures transmitted Aorta Thoracic duct Azygos vein 