What is the role of the ureter in the urinary system?

The ureter plays a crucial role in the urinary system by serving as the conduit that carries urine from the kidneys to the bladder. After the kidneys filter waste products and excess substances from the blood to form urine, this urine is funneled into the ureters. Each kidney has one ureter, which progressively transports the urine through peristaltic movements—muscular contractions that push the urine downwards due to gravity and muscular force. This transport process is vital for proper urinary function, as it ensures that urine produced in the kidneys is efficiently delivered to the bladder for storage until it is expelled from the body.

Understanding the specific functions of each part of the urinary system is essential for grasping how the body manages waste and maintains fluid balance. Other functions mentioned in the choices relate to different structures within the urinary system or have specific roles that do not align with what the ureter is responsible for.