What is the purpose of the ureter?

The ureter's primary function is to transport urine from the kidneys to the bladder. Each kidney produces urine, which then travels through the ureters—one from each kidney—down to the bladder where it is stored until it is excreted from the body. This transport is facilitated by smooth muscle contractions in the ureters that create peristaltic waves, moving urine effectively along the length of each ureter to the bladder.

The other options relate to functions of different parts of the reproductive and excretory systems. For example, transporting urine from the bladder pertains to the role of the urethra, while the transport of ova involves the fallopian tubes and relates to reproductive processes rather than urinary ones. Understanding the specific roles of organs in both the excretory and reproductive systems highlights the distinct functions they perform within the human body.