<Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> In anatomy, the urethra (from Greek οὐρήθρα--ourḗthrā) is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body . In males, the urethra travels through the penis and also carries semen . In human females (and in other primates), the urethra connects to the urinary meatus above the vagina, whereas in non-primates, the female's urethra empties into the urogenital sinus . </P> <P> Females use their urethra only for urinating, but males use their urethra for both urination and ejaculation . The external urethral sphincter is a striated muscle that allows voluntary control over urination . Only in the male is there an additional internal urethral sphincter muscle . </P> <P> In the human male, the urethra is about 8 inches (20 cm) long and opens at the end of the external urethral meatus . The urethra provides an exit for urine as well as semen during ejaculation . </P>

What is the function of the urethral opening
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