Additional structures pass through small openings either in or just outside the diaphragm as they pass from the thoracic cavity to the abdominal cavity (Fig. 4.143):
The greater, lesser, and least (when present) splanchnic nerves pass through the crura, on either side.
The hemi-azygos vein passes through the left crus.
Passing posterior to the medial arcuate ligament, on either side, are the sympathetic trunks.