Final answer:
Just before leaving the kidney, the urine flows through a funnel-shaped structure known as the renal pelvis. This acts as a reservoir from which urine is transported to the ureter and then to the bladder.
Step-by-step explanation:
The renal pelvis is the funnel-like end of a ureter where it enters the kidney, and it serves as a space where urine collects before being transported through the ureter.
Urine is formed in the millions of nephrons that filter the blood. Filtrate from these nephrons first enters the glomerulus, then passes through the renal tubules where it is modified, and ultimately collects in the calyces.
These calyces are cup-like structures that receive the urine from the collecting ducts and then pass it on to the renal pelvis and subsequently to the ureters.
As urine enters the ureters, it is propelled by waves of peristalsis towards the urinary bladder.