Which capillary network surrounds cortical nephrons?

Cortical nephrons are primarily located in the cortex of the kidney and are characterized by their short loop of Henle. The capillary network that surrounds these nephrons is known as the peritubular capillary network. This network arises from the efferent arterioles of the glomeruli associated with the cortical nephrons.

The peritubular capillary network is essential for the process of reabsorption and secretion that occurs during urine formation. As blood passes through the glomeruli, it filters through the glomerular capillaries and exits through the efferent arterioles into the peritubular capillaries. This proximity allows for efficient exchange between the blood and the nephron tubules, enabling the body to reclaim necessary substances while excreting waste.

In contrast, the vasa recta is associated primarily with juxtamedullary nephrons, which have longer loops of Henle that extend deeper into the medulla. Afferent and efferent arterioles are components of the glomerular blood supply but do not surround the nephrons themselves. Therefore, the peritubular capillary network is the most appropriate answer for which capillary network