vas deferens

vas deferens
vas def·er·ens -'def-ə-rənz, -.renz n, pl vasa def·er·en·tia -.def-ə-'ren-ch(ē-)ə a sperm-carrying duct esp. of a higher vertebrate that in humans is a small but thick-walled tube about two feet (0.6 meter) long formed by the union of the vasa efferentia, is greatly convoluted in its proximal portion, begins at and is continuous with the tail of the epididymis, runs in the spermatic cord through the inguinal canal, and descends into the pelvis where it joins the duct of the seminal vesicle to form the ejaculatory duct called also ductus deferens, spermatic duct

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either of a pair of ducts that conduct spermatozoa from the epididymis to the urethra on ejaculation. It has a thick muscular wall the contraction of which assists in ejaculation.

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ductus deferens.

Medical dictionary. 2011.

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  • Vas deferens — Male Anatomy Vertical section of the testis, to show the …   Wikipedia

  • Vas deferens — Vas Vas, n.; pl. {Vasa}. [L., a vessel. See {Vase}.] (Anat.) A vessel; a duct. [1913 Webster] {Vas deferens}; pl. {Vasa deferentia}. [L. vas vessel + deferens carrying down.] (Anat.) The excretory duct of a testicle; a spermatic duct. [1913… …   The Collaborative International Dictionary of English

  • vas deferens — [vas def′ə renz΄] n. pl. vasa deferentia [vā′sə def΄ə ren′shē ə] [ModL < L vas, vessel + deferens, carrying down: see DEFERENCE] the highly convoluted duct that conveys sperm from the testicle to the ejaculatory duct of the penis …   English World dictionary

  • vas deferens — ► NOUN (pl. vasa deferentia) Anatomy ▪ the duct which conveys sperm from the testicle to the urethra. ORIGIN from VAS(Cf. ↑V) + Latin deferens carrying away …   English terms dictionary

  • vas deferens — /vas def euh renz , euhr euhnz/, pl. vasa deferentia /vay seuh def euh ren shee euh, sheuh/. Anat., Zool. the duct that transports the sperm from the epididymis to the penis. [1880 85; < NL vas deferens lit., vessel for carrying off. See VAS,… …   Universalium

  • vas deferens — vas de•fe•rens [[t]ˈvæs ˈdɛf əˌrɛnz, ər ənz[/t]] n. pl. va•sa de•fe•ren•ti•a [[t]ˈveɪ sə ˌdɛf əˈrɛn ʃi ə, ʃə[/t]] anat. zool. a duct that transports sperm from the epididymis to the penis • Etymology: 1880–85; < NL vās dēferēns lit., vessel… …   From formal English to slang

  • Vas deferens — Vas deferens,   der Samenleiter …   Universal-Lexikon

  • vas deferens — Duct in male passage of sperm from testis to penis [McLaughlin, 1980]. Ducts in males for passage of spermatozoa from testis to penis [Moore and McCormick, 1969]. Male duct from the testis to the penile papilla for the passage of sperm [Wilson,… …   Crustacea glossary

  • Vas deferens — Der Samenleiter (lat. Ductus deferens, Vas efferens) verbindet bei männlichen Säugetieren, Vögeln und Reptilien den Nebenhoden mit der Harnröhre und dient der Weiterleitung der Spermien. Der Samenleiter durchzieht, vom Nebenhoden kommend,… …   Deutsch Wikipedia

  • vas deferens — [ dɛfərɛnz] noun (plural vasa deferentia ˌdɛfə rɛnʃɪə) Anatomy the duct which conveys sperm from the testicle to the urethra. Origin C16: from vas + L. deferens carrying away , pres. participle of deferre …   English new terms dictionary

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