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 ?
However, due to the Type I polyorchidism in our patient, only the contralateral normal testis will contribute to future fertility potential because of the lack of epididymis and vas deferens.
Congenital unilateral absence of the vas deferens (CUAVD) may also present with low semen volume and absence or hypoplasia of the ipsilateral seminal vesicles.
If the 5T variant occurs in trans with a severe CFTR mutation, it can result in variable phenotypes, ranging from normal phenotype to congenital bilateral absence of the vas deferens (CBAVD) or mild CF (3, 4).
In no-scalpel vasectomy, the approach to the vas deferens is refined to eliminate surgical incision.
Each vas deferens splits into two smaller branches each resulting in extremely long, thin testes which are only partly shown in Fig.
However, in a series of 500 outpatient vasectomies performed using bilateral scrotal incisions and metal clips to occlude the vas deferens, no failures and no sperm granulomas were encountered and complications were rare, including a single scrotal hematoma and six minor infections.
In a procedure that takes less than 10 minutes, the clip is implanted in each vas deferens to stop the flow of sperm.
In this study, we attempted to identify the interactions and mechanisms between veratrine and paeoniflorin on isolated mouse vas deferens.
Preliminary results from a vasectomy study in seven countries conducted by FHI and EngenderHealth, based in New York, NY, indicate that including fascial interposition leads to a more rapid decrease in sperm counts than performing only simple ligation (tying) and excision (cutting) of the vas deferens, each of two tubes that carry sperm from the testes.
This includes effects on the testis (11,17), efferent ducts (18,19), epididymis and vas deferens (10,11), prostate (20,21), and seminal vesicles (9).
Men with cystic fibrosis have a vestigial or absent vas deferens.
In females, the former develop into the oviduct, uterus, cervix, and vagina; in males, the latter give rise to the epididymis and vas deferens, tubes that carry sperm from the testes.