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the tubular passage through which urine is discharged from the bladder to the exterior of the body. adj., adj ure´thral. The external urinary opening is called the urinary meatus. In men the urethra conveys both urine and the secretions of the reproductive organs. In women its sole function is urination. The female urethra is about 4 cm long; its opening is situated between the clitoris and the opening of the vagina. The male urethra is about 20 cm long and is narrower than that of the female. It has three sections: prostatic, membranous, and penile. It extends downward from the bladder through the prostate, which secretes into it a thin fluid. The membranous portion of the urethra receives the secretion of the bulbourethral glands. The urethra then extends down through the main body of the penis to the opening, or meatus, at the tip. Along the entire length of the passage are mucous glands.
u·re·thra(yū-rē'thră), [TA] Do not confuse this word and its derivatives with ureter and its derivatives.
The canal leading from the bladder, discharging the urine externally.
n. pl. ure·thras or ure·thrae (-thrē)
The canal through which urine is discharged from the bladder in most mammals and through which semen is discharged in the male.
urethra(u-re'thra) [Gr. ourethra]
The tube for the discharge of urine extending from the bladder to the outside. In females, its orifice lies in the vestibule between the vagina and clitoris; in males, the urethra passes through the prostate gland and the penis, opening at the tip of the glans penis. In males, it serves as the passage for semen as well as urine. Its lining, the mucosa, is thrown into folds and contains the openings of the urethral glands. Surrounding the mucosa is a lamina propria containing many elastic fibers and blood vessels, outside of which is an indefinite muscular layer. See: penis; illustration
The female urethra.
The male urethra.urethral (u-re'thral), adjective
urethraThe tube that carries urine from the bladder to the exterior. In the male, the urethra runs along the penis and opens at the tip. In addition to urine it carries seminal fluid during ejaculation. In the female, the urethra is shorter and runs directly downwards from the bladder in front of the VAGINA, opening between the vaginal orifice and the CLITORIS.
urethrathe duct by means of which URINE is discharged from the BLADDER in mammals. In males the distal part of the duct also has a reproductive function, carrying semen from the VAS DEFERENS and voiding to the exterior via the penis.
A passageway from the bladder to the outside for the discharge of urine. In the female this canal lies between the vagina and clitoris; in the male the urethra travels through the penis, opening at the tip.
Mentioned in: Cystometry, Cystoscopy, Enlarged Prostate, Gonorrhea, Hypospadias and Epispadias, Impotence, Lithotripsy, Marshall-Marchetti-Krantz Procedure, Neurogenic Bladder, Nongonococcal Urethritis, Paruresis, Prostate Biopsy, Prostate Ultrasound, Prostatectomy, Retrograde Cystography, Retrograde Urethrography, Saw Palmetto, Urinalysis, Urine Flow Test