Renal pyramids

Machine-translated from the Spanish article

The renal pyramids or pyramids of Malpighi are cone-shaped tissues of the kidney. In typical anatomy, the renal medulla is composed of 14 of these conical subdivisions. The broad base of each pyramid faces the renal cortex, and its apex, or papilla, points inward, discharging into a minor calyx (which, funnel-like, converges into the renal pelvis).