vas deferens

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vas deferens:

see reproductive systemreproductive system,
in animals, the anatomical organs concerned with production of offspring. In humans and other mammals the female reproductive system produces the female reproductive cells (the eggs, or ova) and contains an organ in which development of the fetus takes
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; vasectomyvasectomy,
male sterilization by surgical excision of the vas deferens, the thin duct that carries sperm cells from the testicles to the prostate and the penis. Vasectomy is a popular method of birth control: in 1983, figures showed that approximately 10 million men had been
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.

vas deferens

[′vas ′def·ə·rənz]
(anatomy)
The portion of the excretory duct system of the testis which runs from the epididymal duct to the ejaculatory duct. Also known as ductus deferens.

vas deferens

Anatomy the duct that conveys spermatozoa from the epididymis to the urethra
References in periodicals archive ?
The reproductive condition of these males was determined by weighing their paired vasa deferentia and calculating their sperm count.
Males collected before late-May had mature spermatozoa in their testes and/or vasa deferentia. In males collected after late-May, spermatozoa were already evacuated, and the presence of spermatogonia or spermatocytes in the posterior parts of the testes indicated the initiation of the next spermatogenetic cycles.
According to the current literature, the ventrally located male genital system of Solifugae is generally divided into three different parts: a) a common genital chamber, b) the paired tubular vasa deferentia and c) the long, thin testes.
nasicus between Kansas and the southwestern part of its range in that sperm produced in autumn are stored through winter in the vasa deferentia in both areas.
enyo is similar to that of other North American rattlesnakes in which sperm formation occurs summer-autumn and is stored over winter in the vasa deferentia (see Goldberg 1999a,b,c, 2000a,b,c; Goldberg and Holycross 1999; Goldberg and Rosen 2000; Holycross and Goldberg 2001).
1), indicating that residual vasa deferentia weight tended to decline with the number of potential mating opportunities for males.
Table 1.: Associated aetiologies with calcification of the seminal vesicles and vasa deferentia [Table omitted]
Sperm were present in 74/75 (99%) of the vasa deferentia examined: March 8/9, April 27/27, May 21/21, June 3/3, July 4/4, August 4/4, September 3/3, October 4/4.
Seminal vesicles and vasa deferentia were histologically unremarkable without any invasion.
All three vasa deferentia examined contained sperm: April (1), July (1), November (1).
All 39 vasa deferentia examined contained sperm: February (3), March (1), April (5), May (8), June (10), July (5), August (5), September (2).
Vasa deferentia of 79/79 (100%) males contained sperm: March (5); April (16); May (22); June (7); July (11); August (4); September (5); October (6); November (2); December (1).