Final answer:
The urethra is a fibromuscular tube responsible for transporting urine from the bladder to the outside of the body for elimination.
Step-by-step explanation:
The urethra is a fibromuscular tube that conducts urine outside of the body. In the human excretory system, the urethra's function is to transport urine from the bladder to the outside for disposal. It is a part of the urinary tract and shows significant anatomical differences between males and females.
The male urethra, which is longer, also carries semen in addition to urine, whereas the female urethra solely carries urine. The urethra's opening on the body's surface is known as the external urethral orifice.
Moreover, the ureters are tubes that deliver urine from the kidneys to the bladder, but it is the urethra that ultimately allows for the elimination of urine through urination.