What is the primary function of the urethra?

The primary function of the urethra is to carry urine from the urinary bladder to the outside of the body. This tube-like structure plays a crucial role in the urinary system, allowing for the expulsion of urine during the process of urination. When the bladder fills with urine, signals are sent to the brain indicating that it needs to be emptied. The urethra then facilitates the passage of urine out of the body, completing the elimination process.

The urethra serves a specific purpose, distinct from other parts of the urinary system. For instance, the bladder is responsible for storing urine until it is convenient to expel it, while the kidneys filter blood to create urine, and structures like the ureters transport urine from the kidneys to the bladder. Each part has its own role, but the unique function of the urethra is to provide a route for urine to exit the body, which is why it is vital to maintaining proper urinary function and hygiene.