Pronephric duct
4765753
149352805
2007-08-05T15:03:43Z
Arcadian
104523
infobox
{{Infobox Embryology |
Name = {{PAGENAME}} |
Latin = |
GraySubject = 252 |
GrayPage = 1205 |
Image = |
Caption = |
Image2 = |
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.
==See 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]
{{developmental-biology-stub}}
{{Development of urinary and reproductive systems}}[[Category:Embryology]]