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.

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.

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.

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.
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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

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.

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.

Vas deferens

A tube that is a continuation of the epididymis. This tube transports sperm from the testis to the prostatic urethra.
References in periodicals archive ?
The absent vas deferens found in scrotal or laparoscopic abdominal surgery should lead the surgeon to explore the status of the contralateral vas deferens and conduct a renal tract ultrasound study.
Similarly, the contractile responses of scopoletin (0.5-5 mg/mL) and rutin hydrate (0.5-5 mg/mL) per se on rat vas deferens were also studied.
granulata with approximately 2 mm length pseudopenis in the advance stages of imposex including vas deferens formation amongst samples from the King Bay east site in Western Australia.
Secretory activity is also evident in the vas deferens and in the ampulla in individuals after five molts.
The complex relationships between cystic fibrosis and congenital bilateral absence of the vas deferens: clinical, electrophysiological and genetic data.
Similarly, the data on Table IV suggest that as sperm cells traverse the vas deferens a decrease of intact spermatozoa occurs whereas those undergoing acrosomal reaction increase.
They sequentially injected four layers of materials into the vas deferens: a hydrogel that forms a physical barrier to sperm; gold nanoparticles, which heat up when irradiated with near-infrared light; ethylenediaminetetraacetic acid (EDTA), a chemical that breaks down the hydrogel and also kills sperm; and finally, another layer of gold nanoparticles.
Success of reversal microsurgery is highly dependent on the skill of the surgeon, the duration after the vasectomy itself and the location of the initial cut along the vas deferens. Further, despite a successful surgery, there is still need to ensure the female partner is fertile and that the man does generate adequate, viable sperm.
5 According to Nudell and Turek if vas deferens was palpable and FSH was elevated so it indicates NOA.
Extreme care was taken to avoid damage to vas deferens and gonadal vessels at this stage in male patients.
Late orchidopexy, damage of testis and vas deferens during surgery and abnormal anatomic connection of testes to the excretory ducts are some of the causes of infertility (13,14,15).