<prompt> Middle Supra renal arthery is a branch ofAbdominal aortaRenal arteryInferior phrenic arteryAll of the above  <response>: A. Abdominal aorta 217-snell 7th 338-BDC-3 6th SUPRARENAL GLAND 1. Arterial supply- Each gland is supplied by A. Superior suprarenal artery-a. branch of inferior phrenic artery B. Middle suprarenal artery- a branch of the abdominal aorta C. Inferior suprarenal artery- a branch of the renal artery 2. Venous drainage i. Right suprarenal vein drains to -IVC ii. Left suprarenal vein drain in to left renal vein 3. Development i. Cortex of the gland -Mesoderm of coelomic epithelium ii. Medulla -Neuroectoderm Double superior vena cava- occurs due to persistence of left anterior cardinal vein. The right SVC opens directly into right atrium while one opens through coronary sinus Double inferior vena cava- is formed below renal veins due persistence of both the sub cardinal and supracardinal vein below the kidney 