Fig. 6.

Foxd1^−/− kidneys are irrigated by multiple branches from the aorta instead of a single renal artery. A–C: transversal sections of E17.5 Foxd1^−/− kidneys and vertebral area show midline fusion of the kidneys (arrows), ventrally oriented ureters (shown as U in C), and multiple capsular arteries (arrowheads). D–L: sagittal sections of E17.5 Foxd1^−/− kidneys show several capsular arteries entering the kidneys and some of them originating from the aorta at different levels. M: sagittal section of E17.5 littermate control kidneys shows a single renal artery entering the kidney on the left side and normal midline orientation of the ureters (U). Scale bars: 500 μm.