Final answer:
The combining form "urethr/o" refers to the urethra, which is responsible for transporting urine from the bladder to the exterior of the body.
Step-by-step explanation:
The CF urethr/o means urethra. This term is used in the medical field to refer to the tube that transports urine from the bladder to the outside of the body for disposal. The urethra has different anatomical features in males and females, with the male urethra being significantly longer and also serving as a passage for semen, unlike the female urethra. The urethra is the tube that lets urine leave your bladder and your body.