The region of the kidneys where the renal artery, renal vein, nerves, and ureter enter and exit the kidney is called the .

The region of the kidneys where the renal artery, renal vein, nerves, and ureter enter and exit the kidney is called the hilum.

The hilum serves as the main entry and exit point for these vital structures, making it a key anatomical feature of the kidney. At the hilum, the renal artery branches from the abdominal aorta to supply blood to the kidney, while the renal vein collects deoxygenated blood to return it to systemic circulation. Nerves that innervate the kidney also pass through this region, as well as the ureter, which is responsible for transporting urine from the kidney to the bladder. Understanding the significance of the hilum is crucial in anatomy and renal physiology, as it plays an essential role in the kidney's function and overall health.