Pronephric duct

Pronephric duct

Infobox Embryology
Name = PAGENAME
Latin =
GraySubject = 252
GrayPage = 1205


Caption =


Caption2 =
System =
Precursor = intermediate mesoderm
GivesRiseTo = Wolffian duct
MeshName =
MeshNumber =
DorlandsPre = d_29
DorlandsSuf = 12314334
The pronephric duct is the predecessor of the Wolffian duct.

Development

The development of the pronephric duct is a part of the development of the urinary and reproductive organs.

In the outer part of the intermediate mesoderm, immediately under the ectoderm, in the region from the fifth cervical segment to the third thoracic segment, a series of short evaginations from each segment grows dorsally and extends caudally, fusing successively from before backward to form the pronephric duct. This continues to grow caudalward until it opens into the ventral part of the cloaca; beyond the pronephros it is termed the Wolffian duct. Thus, the Wolffian duct is what remains of the pronephric duct after the atrophy of the pronephros.

ee also

* pronephros

External links

* [http://mcb.berkeley.edu/courses/mcb131/handouts/Harland/kidneylung.htm Diagram at berkeley.edu]
* [http://www.xenbase.org/xmmr/Marker_pages/crest/ets-1.html Photos at xenbase.org]


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Look at other dictionaries:

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