<prompt> Vena caval opening is at what level in the diaphragm?T6T8T10T12  <response>: Ans. is b i.e., T8 Opening Level Part of diaphragm Shape Structures passing Vena caval T8 Central tendon Quadrilateral 1. Inferior vena cava 2. Branches of right phrenic nerve Oesophageal T10 Muscular portion derived from right crus Ellipticaloval 1. Oesophagus 2. Oesophageal branch of left gastric vessels 3. VagusGastric nerves Aortic osseoapon- eurotic Between right and Left crus posterior to diaphragm 1. Aorta 2. Thoracic duct 3. Azygous vein T12 Round 