Which of the following arteries arises from the abdominal aorta at the level of the L2 vertebra?

Explanation

## Arterial Origins from the Abdominal Aorta **Key Point:** The renal arteries arise from the abdominal aorta at the level of the **L1–L2** vertebrae (at the level of the renal hila), making them the correct answer when the stem specifies the L2 vertebral level. ### Levels of Major Abdominal Aortic Branches | Artery | Vertebral Level | |--------|-----------------| | Celiac trunk | T12–L1 | | Superior mesenteric artery (SMA) | L1 | | Renal arteries | L1–L2 | | Inferior mesenteric artery (IMA) | L3 | | Aortic bifurcation (→ common iliac) | L4 | **High-Yield:** The renal arteries arise laterally from the abdominal aorta just below the origin of the SMA, at approximately the L1–L2 level. The right renal artery is longer and passes posterior to the inferior vena cava, right renal vein, head of pancreas, and descending duodenum. **Clinical Pearl:** Knowledge of the vertebral levels of aortic branches is essential for interpreting CT/MRI imaging and for surgical planning. The mnemonic **"Coeliac at 12, SMA at L1, Renals at L1–L2, IMA at L3"** is widely used in anatomy teaching (Gray's Anatomy; Snell's Clinical Anatomy). **Why the other options are incorrect:** - **Celiac trunk (D):** Arises at T12–L1, not L2. - **Superior mesenteric artery (B):** Arises at L1, not L2. - **Inferior mesenteric artery (C):** Arises at L3, not L2. *Reference: Snell's Clinical Anatomy by Regions, 10th ed.; Gray's Anatomy, 41st ed.*