View source for Endocardial cushions

{{Infobox Embryology |
  Name          = {{PAGENAME}} |
  Latin         = |
  GraySubject   = 135 |
  GrayPage      = 512 |
  Image         = Gray465.png |
  Caption       = Interior of dorsal half of heart from a human [[embryo]] of about thirty days.  |
  Image2        = |
  Caption2      = |
  System        = |
  CarnegieStage = 14 |
  Days          = 27 |
  Precursor     = [[neural crest]]<ref name="pmid11376439">{{cite journal |author=Maschhoff KL, Baldwin HS |title=Molecular determinants of neural crest migration |journal=Am. J. Med. Genet. |volume=97 |issue=4 |pages=280–8 |year=2000 |pmid=11376439 |doi= |url=http://dx.doi.org/10.1002/1096-8628(200024)97:4<280::AID-AJMG1278>3.0.CO;2-N}}</ref> |
  GivesRiseTo   = [[septum intermedium]] |
  MeshName      = |
  MeshNumber    = |
  DorlandsPre   = c_68 |
  DorlandsSuf   = 12272771  |
}}
{{CMG}}



The lumen of the [[atrial canal]] is reduced to a transverse slit, and two thickenings appear, one on its dorsal and another on its ventral wall. These thickenings, or '''endocardial cushions''' as they are termed, project into the canal, and, meeting in the middle line, unite to form the [[septum intermedium]] which divides the canal into two channels, the future right and left atrioventricular orifices.

==See also==
* [[mesenchyme]]

==References==
{{reflist}}

==External links==
* {{EmbryologyTemple|Heart98/heart97a/sld033}}
* {{eMedicine|med|670}}
* [http://sprojects.mmi.mcgill.ca/embryology/cvs/ecc.html Overview at mcgill.ca]

{{Gray's}}
{{Development of circulatory system}}
[[Category:Embryology]]

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