vas deferens

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vas

 [vas] (pl. va´sa) (L.)
vessel. adj., adj va´sal.
vas aber´rans
1. a blind tube sometimes connected with the epididymis; a vestigial mesonephric tube.
2. any anomalous or unusual vessel.
va´sa afferen´tia vessels that convey fluid to a structure or part.
va´sa bre´via short gastric arteries.
vas de´ferens ductus deferens.
va´sa efferen´tia vessels that convey fluid away from a structure or part.
va´sa lympha´tica lymphatic vessels.
va´sa prae´via the presentation, in front of the fetal head during labor, of the blood vessels of the umbilical cord where they enter the placenta.
va´sa rec´ta re´nis long U-shaped vessels arising from the efferent glomerular arterioles of juxtamedullary nephrons and supplying the renal medulla. Called also arteriolae rectae renis.
va´sa vaso´rum the small nutrient arteries and veins in the walls of the larger blood vessels.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

duc·tus def·er·ens

[TA]
the secretory duct of the testicle, extending from the epididymis, of which it is the continuation, to its merging with the excretory duct of the seminal gland to form the ejaculatory duct.
Farlex Partner Medical Dictionary © Farlex 2012

vas deferens

(dĕf′ər-ənz, -ə-rĕnz′)
n. pl. vasa deferentia (dĕf′ə-rĕn′shē-ə)
A duct through which semen is carried from the epididymis of each testicle to an ejaculatory duct.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

duc·tus def·er·ens

(dŭk'tŭs def'ĕr-enz) [TA]
The secretory duct of the testicle, running from the epididymis, of which it is the continuation, to the prostatic urethra where it terminates as the ejaculatory duct.
Synonym(s): arteriola glomerularis efferens [TA] , deferent duct, spermatic duct, spermiduct (1) , vas deferens.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
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VAS DEFERENS AND OTHER MALE ORGANS

vas deferens

The secretory duct of the testis, a continuation of the epididymis. This slim, muscular tube, approx. 18 in (45.7 cm) long, transports the sperm from each testis to the ejaculatory duct, which empties into the prostatic urethra.
Synonym: ductus deferens See: illustration; genitalia for illus.
See also: vas
Medical Dictionary, © 2009 Farlex and Partners

vas deferens

The fine tube that runs up in the SPERMATIC CORD on each side from the EPIDIDYMIS of the TESTICLE, over the pubic bone and alongside the bladder to end by joining the seminal vesicle near its entry to the PROSTATE GLAND. The vas deferens conveys spermatozoa from the testicle to the seminal vesicle. See also VASECTOMY.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

vas deferens

(pl. vasa deferentia) a duct conveying sperm from the TESTIS to the exterior in invertebrates or, in vertebrates, to the cloaca or URETHRA and hence to the outside.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Vas deferens

A tube that is a continuation of the epididymis. This tube transports sperm from the testis to the prostatic urethra.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.