KidneyALA

Blood Supply

Renal Artery Renal Vein

Segmental arteries Segmental veins

Interlobar arteries Interlobar veins

Arcuate arteries Arcuate veins

Interlobular arteries Interlobular veins

Afferent arterioles Venules

Glomerulus

Efferent arterioles

Peritubular capillaries

Nerve Supply

• The renal nerves arise from the superior mesenteric ganglion and enter the hilum of each kidney.

• They follow branches of the renal artery to reach individual nephrons.

• These nerves consist mostly of sympathetic fibers that regulate the blood flow into and out of each nephron, and thus control the rate of filtration and urine formation.

• If the blood pressure falls, they also stimulate the nephron to secrete renin, which ultimately restores blood pressure by mechanisms.

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