The descending aorta gives off several fine arteries to the oesophagus inferior to the level of the tracheal bifurcation. These tend to arise directly. A few vessels may arise indirectly via the proximal section of a posterior intercostal artery.
The branches run inferiorly and either medially at the superior end of the aorta, or anteriorly at the inferior end of the aorta, to form a plexus on the surface of the oesophagus.
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