juxtamedullary nephron

A juxtamedullary nephron is a type of nephron, found only in birds and mammals.

The efferent arterioles of the juxtamedullary nephron drain into the vasa recta.

However, in most depictions of the nephron, it is a juxtamedullary nephron which is depicted.

In other words, a juxtamedullary nephron is one where the renal corpuscle is close to the medulla, and the proximal convoluted tubule and its associated loop of Henle occur at a deep position compared to most other nephrons.