Q: Through which blood vessel is blood supplied to the cortex?  

Answer: A

The renal cortex is the outer portion of the kidney that contains nephrons, which are the functional units of the kidney. The interlobular arteries are the branches of the renal artery that supply blood to the cortex. They run through the renal columns and give off the afferent arterioles that enter the glomeruli of the nephrons. The glomeruli are responsible for filtering the blood and removing waste products. After passing through the glomeruli, the blood is collected by the efferent arterioles, which then go on to form the peritubular capillaries and vasa recta. The peritubular capillaries and vasa recta are responsible for reabsorbing useful substances from the filtrate back into the blood.

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