Fig. 3
From: Angio CT assessment of anatomical variants in renal vasculature: its importance in the living donor
Diagrams showing arterial mesonephric blood supply and its relationship to eventual metanephros in a 4–6-week embryo and 8–10-week embryo. SMA: Superior mesenteric artery, IMA: inferior mesenteric artery, 1: cranial group mesonephric arteries, 2: middle group mesonephric arteries, RG: reproductive gland, MSN: mesonephros, MTN: metanephros, RAU: rete arteriosum urogenitale, SMA: superior mesenteric artery, IMA: inferior mesenteric artery, GA: gonadal artery, AG: adrenal gland, AA: adrenal artery, MTN: metanephros, RA: renal artery, PAA: polar accessory artery. The adrenal artery usually develops from the cranial group of mesonephric arteries whereas the gonadal artery forms from arteries of the caudal group (RAU). The definite renal artery comes either from the last branch of the middle group or the first of the caudal group. Persisting mesonephric arteries form accessory vessels (PAA) as shown in the example