The renal artery divides into smaller
segmental arteries, which in turn branch into lobar arteries.
Lobararteries branch and enter the columns as interlobar, then turn and follow the
cortex-medulla boundary as arcuate arteries. Cortical radiate arteries travel up into the cortex and branch into afferent arterioles, which enter the Bowmanʹs capsule as glomerular capillaries and exit as efferent arterioles branching further into peritubular capillaries and the vasa recta. These capillaries return via the
cortical radiate, arcuate, interlobar, lobar, segmental, and renal veins.