Final answer:
The male urethra is an anatomically distinct organ, averaging 20 cm in length, divided into four regions: preprostatic, prostatic, membranous, and spongy urethra.
Step-by-step explanation:
The male urethra is a crucial component of the male urologic system, with a primary role in transporting urine from the bladder to the outside of the body. Additionally, in the context of reproductive function, it transports semen. The male urethra is on average about 20 cm in length and is divided into four regions: the preprostatic urethra, the prostatic urethra, the membranous urethra, and the spongy (penile) urethra. Each segment has distinct anatomical features and functions, contributing to the urethra's complex role in both urinary and reproductive systems.