Urethra.
It is
a narrow tube that is connected to both the bladder and the ejaculatory duct
(in that order). It is therefore responsible for transporting urine and semen
from the body. It is a fibro-muscular duct that is housed by the penis. It
outer part of the urethra contains some sphincter muscles that allow
voluntary control over urine while the inner part of the urethra allows for
involuntary transmission of semen during ejaculation.