What is the primary function of the ureters?

The primary function of the ureters is to transport urine from the kidneys to the urinary bladder. They are muscular tubes that help propel urine, which is produced in the kidneys, through peristaltic movements. This means that the ureters play a critical role in the urinary system by ensuring that the urine flows in the correct direction and is stored in the bladder until it is ready to be excreted.

The other choices do not accurately describe the primary function of the ureters. Filtering blood is the function of the kidneys, not the ureters. Storing urine is the role of the urinary bladder, while producing urine occurs in the kidneys as well. Thus, the connection of the ureters between the kidneys and the urinary bladder emphasizes their essential role in the urinary tract, making the identification of their primary function as transporting urine clear.