The red X is located over which part of the kidney?

The correct answer indicates that the red X is located over the structure known as the major calyx of the kidney. The major calyces are large, funnel-shaped structures that collect urine from the minor calyces, which in turn receive urine from the renal pyramids. Each kidney contains two or more major calyces that converge to form the renal pelvis, which then leads to the ureter.

The presence of the red X over the major calyx suggests that it is specifically highlighting this collection area within the kidney that plays a crucial role in directing urine flow from the minor calyces to the renal pelvis, ultimately facilitating the expulsion of urine from the kidney to the ureter and then to the bladder. This anatomical layout is essential for understanding the kidney’s function in urine formation and transport.