The image displays an anatomical illustration of the human urinary system. The title above the image is in Russian and translates to "Structure of the urinary system." Several parts of the system are labeled with numbers. Label 1 points to the adrenal gland, which sits atop the kidney. Label 2 points to the ureter, the tube that carries urine from the kidney to the bladder. Label 3 points to the bladder, where urine is stored. Label 4 points to the urethra, the tube that carries urine from the bladder out of the body. Given this information, what are the structures labeled 1, 2, 3, and 4?