Descending Aorta Abdominal Portion

  (Abdominal Aorta)

Origin and Course

• Continuation of Thoracic Aorta below the Diaphragm
• Starts at the diaphragm
• Ends by bifurcating into Common Iliac arteries at the level of L4-5

Relationship

• Posteriorly
  • Spine
  • Lumbar arteries and veins
• Anteriorly
  • Body of Pancreas
  • Left renal vein
  • Horizontal portion of duodenum
• Right
  • Azygous vein
  • Right diaphragmatic crus
  • IVC below L2
• Left
  • Left diaphragmatic crura

Branches

• Ventral
  • Celiac
  • SMA
  • IMA
• Dorsal
  • Lumbar
  • Median sacral
• Lateral
  • Renal
  • Inferior phrenic
  • Middle supra renal
  • Gonadal