Question

this structure connects the renal pelvis to the bladder. urethra ureter major calyx renal vein

Explanation:

The ureter is the tube - like structure that transports urine from the renal pelvis of the kidney to the bladder. The urethra is for urine expulsion from the bladder to outside the body, the major calyx is part of the kidney's collecting system, and the renal vein is for blood drainage from the kidney.

Answer:

Ureter