Final answer:
The arteries that form the afferent arterioles leading to the glomeruli in the kidney are the cortical radiate arteries.
Step-by-step explanation:
The arteries that branch to form the afferent arterioles to the glomeruli are the cortical radiate arteries. The progression of blood supply in the kidney starts with the renal artery which splits into segmental arteries. These segmental arteries then branch into interlobar arteries that navigate through the renal columns reaching the cortex. Subsequently, interlobar arteries bifurcate into arcuate arteries. From these, cortical radiate arteries extend and finally branch into many afferent arterioles, which serve approximately 1.3 million nephrons in each kidney.