Which structure conveys urine from the bladder to outside the body?

The structure that conveys urine from the bladder to outside the body is the urethra. The urethra is a tube-like structure that extends from the bladder and opens at the external environment, allowing for the expulsion of urine during the process of urination.

The urethra has a crucial role in the urinary system, as it is the final pathway through which urine exits the body after being stored in the bladder. It is important to note that the urethra varies in length and structure between males and females, which can influence the flow and control of urine.

In contrast, the ureter is responsible for transporting urine from the kidneys to the bladder, not from the bladder to the exterior. The kidneys are the organs that filter blood and produce urine, thus playing a vital role in urine formation but not in its excretion. The prostate is a gland found in males that contributes to the production of seminal fluid, but it does not have a direct function in the conveyance of urine.