WordNet

of nerves and nerve impulses; conveying information away from the CNS; "efferent nerves and impulses" (同)motorial
a very small duct (同)ductulus

PrepTutorEJDIC

(血管・導管が)輸出性の,導出性の;(神経が)遠心性の

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/06/12 21:29:13」(JST)

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The efferent ducts (or efferent ductules or ductuli efferentes or ductus efferentes or vasa efferentia) connect the rete testis with the initial section of the epididymis.

There are two basic designs for efferent ductule structure:

a) multiple entries into the epididymis, as seen in most large mammals. In humans and other large mammals, there are approximately 15–20 efferent ducts, which also occupy nearly one third of the head of the epididymis.
b) single entry, as seen in most small animals such as rodents, whereby the 3–6 ductules merge into a single small ductule prior to entering the epididymis.

The ductuli are unilaminar and composed of columnar ciliated and non-ciliated (absorptive) cells. The ciliated cells serve to stir the luminal fluids, possibly to help ensure homogeneous absorption of water from the fluid produced by the testis, which results in an increase in the concentration of luminal sperm. The epithelium is surrounded by a band of smooth muscle that helps to propel the sperm toward the epididymis.

Additional images

External links

Anatomy photo: Reproductive/mammal/testis0/testis4 - Comparative Organology at University of California, Davis – "Mammal, testis overview"
Anatomy photo:36:10-0100 at the SUNY Downstate Medical Center – "Inguinal Region, Scrotum and Testes: Reflection of the Head of the Epididymis"
Histology image: 16903loa – Histology Learning System at Boston University
Diagram/Quiz (cancer.gov)

This article related to the genitourinary system is a stub. You can help Wikipedia by expanding it.

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English Journal

Ductuli efferentes of the male Golden Syrian hamster reproductive tract.

Ford J Jr1, Carnes K, Hess RA.
Andrology.Andrology.2014 Jul;2(4):510-20. doi: 10.1111/j.2047-2927.2014.00194.x. Epub 2014 Mar 28.
Efferent ductules are responsible for the transportation of spermatozoa from the testis to the epididymis and their epithelium is responsible for the reabsorption of over 90% of the luminal fluid. The purpose of this research was to characterize the gross morphology and histology of efferent ductule
PMID 24677666

Cystic rete testis with testicular dysplasia in a rabbit.

Chambers JK1, Uchida K, Murata Y, Watanabe K, Ise K, Miwa Y, Nakayama H.
The Journal of veterinary medical science / the Japanese Society of Veterinary Science.J Vet Med Sci.2014 May;76(5):751-5. Epub 2014 Jan 16.
An 8-year-old intact rabbit was presented to a veterinary hospital with a complaint of enlarged left scrotum. Histological examination revealed a single large cyst adjacent to an efferent ductule-like tissue. The cyst wall was composed of monolayer cuboidal cells surrounded by dysplastic testicular
PMID 24430659

Japanese Journal

Epididymal lithiasis in roosters and efferent ductule and testicular damage

MAHECHA GA
Reproduction 124, 821-834, 2002
NAID 30010360003

農薬カーベンダジン投与後の精巣の障害は精巣輸出管の開存数に依存する

後藤介俊,根津潤,中井雅晶 [他],那須哲夫
The journal of veterinary medical science 61(7), 755-760, 1999-07-25
成熟雄ラットに農薬カーベンダジン(methyl 2-benzimidazole carbamate)を投与(100mg/kg)し, 8, 16, 32および70日後に精巣輸出管の閉塞状態によって, 精巣の障害にどのような違いが現れるかを調べた. 精巣上体の連続切片において精巣輸出管の開存数を確認後, 各精巣を「全ての精巣輸出管が開存」, 「一部の精巣輸出管が開存」あるいは「全ての精巣輸出管が閉塞」 …
NAID 110003920171

Related Pictures

★リンクテーブル★

リンク元	「精巣輸出管」
関連記事	「efferent」「efferents」

「精巣輸出管」

Efferent ducts
	The location of the efferent ducts within an adult human testicle
	Vertical section of the testis, to show the arrangement of the ducts. (Labeled as vasa efferentia as top center.)
Details
Precursor	Wolffian duct
Latin	Ductus efferentes testis
Dorlands; /Elsevier	d_29/12314687
	Anatomical terminology [edit on Wikidata]