At which vertebral level does the aorta traverse the diaphragm?

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Prepare for the NBME Gross Anatomy Test. Study with flashcards and multiple choice questions; each question includes hints and explanations. Ace your exam!

Multiple Choice

At which vertebral level does the aorta traverse the diaphragm?

Explanation:
The aorta passes through the diaphragm at the aortic hiatus, located around the level of the T12 vertebra. This hiatus is the posterior opening through which the aorta (and accompanying thoracic duct in some cases) transitions from the thoracic to the abdominal cavity. In contrast, the caval opening for the IVC lies higher at T8, and the esophageal hiatus for the esophagus and vagal trunks is at T10. So, the level at which the aorta traverses the diaphragm is T12.

The aorta passes through the diaphragm at the aortic hiatus, located around the level of the T12 vertebra. This hiatus is the posterior opening through which the aorta (and accompanying thoracic duct in some cases) transitions from the thoracic to the abdominal cavity. In contrast, the caval opening for the IVC lies higher at T8, and the esophageal hiatus for the esophagus and vagal trunks is at T10. So, the level at which the aorta traverses the diaphragm is T12.

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