External urethral orifice Definition
It refers to the external aperture (opening) of the urethra in males, as well as females, from which urine is passed out during urination.
External urethral orifice in males
In males, the opening is usually found at the tip of the penis. It appears as a vertical slit and is bounded on either side by two small protrusions (shaped like labia). In males, the aperture assists in the twin functions of urination and ejaculation. In females, it only assists in urination.
In some males, the slit may have a more round appearance. Although this can occur naturally, it may also happen due to removal of excess skin during circumcision.
External urethral orifice in females
In females, the organ only assists in urination. It is located in a position right before the vagina and about 2.5 cm rear to the glans clitoridis. It generally appears as a small sagittal cleft with slightly elevated borders.
External urethral orifice Disorders
There can be various problems and deformities of the External urethral orifice. There can be congenital misplacement of the urethral aperture known as Epispadias (when the opening is situated in the dorsum) and Hyposadias (when the opening is situated under the penis).
External urethral orifice Pictures
Take a look at these images of the External urethral orifice in males.
Picture 1 – External urethral orifice (male)
Picture 2 – External urethral orifice (female)