Meatus
- This is an article about Human Anatomy
External urethral orifice (male)
The external urethral orifice is the external opening or meatus of the urethra, normally placed at the tip of glans penis; it presents as a vertical slit, possibly bounded on either side by two small labia-like projections. Congenital misplacement of the urethral orifice is called hypospadias when it is located in the underside (ventral aspect) of the penis, and epispadias when located in the dorsum (upper aspect).
External urethral orifice (female)
The external urethral orifice (urinary meatus) is the external opening of the urethra, from which urine is ejected during urination. It is placed about 2.5 cm behind the glans clitoridis and immediately in front of that of the vagina; it usually assumes the form of a short, sagittal cleft with slightly raised margins.
To its left and right are the openings of the Skene's ducts.
Internal urethral orifice
The internal urethral orifice is the opening of the urinary bladder into the urethra. It is placed at the apex of the trigonum vesicae, in the most dependent part of the bladder, and is usually somewhat crescent-shaped; the mucous membrane immediately behind it presents a slight elevation in males, the uvula vesicae, caused by the middle lobe of the prostate.
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