Vas deferens

(Redirected from Ductus deferens)
Jump to navigation Jump to search

Template:Infobox Anatomy

WikiDoc Resources for Vas deferens

Articles

Most recent articles on Vas deferens

Most cited articles on Vas deferens

Review articles on Vas deferens

Articles on Vas deferens in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Vas deferens

Images of Vas deferens

Photos of Vas deferens

Podcasts & MP3s on Vas deferens

Videos on Vas deferens

Evidence Based Medicine

Cochrane Collaboration on Vas deferens

Bandolier on Vas deferens

TRIP on Vas deferens

Clinical Trials

Ongoing Trials on Vas deferens at Clinical Trials.gov

Trial results on Vas deferens

Clinical Trials on Vas deferens at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Vas deferens

NICE Guidance on Vas deferens

NHS PRODIGY Guidance

FDA on Vas deferens

CDC on Vas deferens

Books

Books on Vas deferens

News

Vas deferens in the news

Be alerted to news on Vas deferens

News trends on Vas deferens

Commentary

Blogs on Vas deferens

Definitions

Definitions of Vas deferens

Patient Resources / Community

Patient resources on Vas deferens

Discussion groups on Vas deferens

Patient Handouts on Vas deferens

Directions to Hospitals Treating Vas deferens

Risk calculators and risk factors for Vas deferens

Healthcare Provider Resources

Symptoms of Vas deferens

Causes & Risk Factors for Vas deferens

Diagnostic studies for Vas deferens

Treatment of Vas deferens

Continuing Medical Education (CME)

CME Programs on Vas deferens

International

Vas deferens en Espanol

Vas deferens en Francais

Business

Vas deferens in the Marketplace

Patents on Vas deferens

Experimental / Informatics

List of terms related to Vas deferens

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Overview

The vas deferens (plural: vasa deferentia), also called ductus deferens, (Latin: "carrying-away vessel") is part of the male anatomy of some species, including humans.

Structure

There are two such ducts; they are muscular tubes (surrounded by smooth muscle) connecting the left and right epididymis to the ejaculatory ducts in order to move sperm. Each tube is about 30 centimeters long (in humans).

They are part of the spermatic cords.

Function in ejaculation

During ejaculation the smooth muscle in the walls of the ductus deferens or vas deferens contracts reflexively, thus propelling the sperm forward. This is also known as peristalsis. The sperm is transferred from the vas deferens into the urethra, collecting secretions from the male accessory sex glands such as the seminal vesicles, prostate gland and the bulbourethral glands, which form the bulk of semen.

Significance in contraception

The procedure of deferentectomy, popularly known as a vasectomy, is a method of contraception in which the vasa deferentia (Latin plural) are permanently cut, though in some cases it can be reversed. A modern variation, which is also popularly known as a vasectomy even though it does not include cutting the vas, involves injecting an obstructive material into the ductus to block the flow of sperm.

Investigational attempts for male contraception have focused on the vas with the use of the intra vas device and reversible inhibition of sperm under guidance (RISUG).

Blood supply

The vas deferens is supplied by an accompanying artery (artery of vas deferens). This artery normally arises from the superior vesical artery, itself a branch of the internal iliac artery.

Additional images

See also

External links

Template:Male reproductive system

cs:Chámovod de:Samenleiter dv:މަނި ހޮޅި it:Dotto deferente he:צינור הזרע la:Vas deferens lt:Sėklinis latakas nl:Zaadleider nds:Samenleider simple:Vas deferens sl:Semenovod fi:Siemenjohdin sv:Sädesledare te:శుక్రవాహిక

Template:WH Template:WS