As previously mentioned the caudal part of the urogenital passage forms the urethra. In females it forms the whole urethra however in males it is added to by the penile urethra which develops separately as part of the genitals. | As previously mentioned the caudal part of the urogenital passage forms the urethra. In females it forms the whole urethra however in males it is added to by the penile urethra which develops separately as part of the genitals. |