Despite their relatively small size, the kidneys receive approximately 20% of the cardiac output.

Each arcuate artery supplies several interlobular arteries that feed into the afferent arterioles that supply the glomeruli.

After filtration occurs, the blood moves through a small network of venules that converge into interlobular veins.

However, this model is greatly simplified for clarity and symmetry.

The interlobar artery and vein (not to be confused with interlobular) are between two renal lobes, also known as the renal column (cortex region between two pyramids).

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)