urethra

urethral, adj.
/yoo ree"threuh/, n., pl. urethrae /-three/, urethras. Anat.
the membranous tube that extends from the urinary bladder to the exterior and that in the male conveys semen as well as urine.
[1625-35; < LL < Gk ouréthra, equiv. to oure- (see URETER) + -thra n. suffix]

* * *

 duct that transmits urine from the bladder to the exterior of the body during urination. The urethra is held closed by the urethral sphincter, a muscular structure that helps keep urine in the bladder until voiding can occur.

      Because the urethra is anatomically linked with the reproductive structures in the male, the characteristics of the male's and female's urethra are quite different. The male's urethra is about 8 inches (20 cm) long and passes along the length of the penis before emptying. At its emergence from the bladder, the urethra passes through the prostate gland, and seminal ducts from the testes enter the urethra at each side, making it the pathway for the transmission of semen as well as for the discharge of urine. The male urethra can be divided into three sections: the uppermost within the prostate, the next section within the urethral sphincter, and the lowermost (and longest) section within the penis.

      The female urethra is embedded within the vaginal wall, and its opening is situated between the labia. The female urethra is much shorter than that of the male, being only 1 1/2 inches (4 cm) long. It opens to the outside just after passing through the urethral sphincter. Both the male and female urethra are subject to bacterial infections (see urethritis).

* * *


Universalium. 2010.

Look at other dictionaries:

  • Urethra — Gray s subject #256 1234 Artery Inferior vesical artery Middle rectal artery Internal pudendal artery Vein …   Wikipedia

  • urethra — canal through which urine is discharged from the bladder, 1630s, from L.L. urethra, from Gk. ourethra the passage for urine, coined by Hippocrates from ourein to urinate, from ouron (see URINE (Cf. urine)) …   Etymology dictionary

  • urethra — [yoo rē′thrə] n. pl. urethrae [yo͞o rē′thrē΄] or urethras [LL < Gr ourēthra < ouron, URINE] the duct through which urine is discharged from the bladder in most mammals: in the male, semen is also discharged through the urethra urethral adj …   English World dictionary

  • Urethra — U*re thra, n. [L., fr. Gr. ?. See {Urine}.] (Anat.) The canal by which the urine is conducted from the bladder and discharged. [1913 Webster] …   The Collaborative International Dictionary of English

  • Urēthra — (gr.), die Harnröhre. Urethrämorrhagie, Blutfluß aus der Harnröhre. Urethralgie, Schmerz in der Harnröhre. Urethralis blennorrhoea, die Gonorrhöe. Urethremphraxis (Urethrophraxia), Verstopfung der Harnröhre. Urethreurvter, Ausdehnungswerkzeug der …   Pierer's Universal-Lexikon

  • Urēthra — (lat.), die Harnröhre (s. d.) …   Meyers Großes Konversations-Lexikon

  • Urethra — Urēthra (grch.), Harnröhre; Urethrītis, Entzündung der Harnröhre; Urethrālstriktur, Harnröhrenverengerung; Urethroskopīe, Untersuchung der Harnröhre mittels Urethroskōps oder Endoskops (s.d.); Urethrospasmus, Harnröhrenkrampf; Urethrotomīe,… …   Kleines Konversations-Lexikon

  • urethra — ► NOUN Anatomy & Zoology ▪ the duct by which urine is conveyed out of the body, and which in male vertebrates also conveys semen. DERIVATIVES urethral adjective. ORIGIN Greek our thra, from ourein urinate …   English terms dictionary

  • Urethra — Die Harnröhre (lat. Urethra) beginnt am unteren Ende der Harnblase und mündet bei männlichen Säugetieren auf der Eichel, bei weiblichen im Scheidenvorhof. Sie dient bei beiden Geschlechtern der Ausscheidung des Urins, bei männlichen Säugetieren… …   Deutsch Wikipedia

  • Urethra — The transport tube leading from the bladder to discharge urine outside the body. In males, the urethra travels through the penis, and carries semen as well as urine. In females, the urethra is shorter than in the male and emerges above the… …   Medical dictionary


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.