Difference between revisions of "File:Placenta anchoring villi.jpg"

From Embryology
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Placenta anchoring villi
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==Placenta Anchoring Villi==
  
 
Histological image showing the junctional region between the trophoblast shell of the conceptus and the maternal decidua.
 
Histological image showing the junctional region between the trophoblast shell of the conceptus and the maternal decidua.
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The maternal component is formed by the decidualization of the endometrium.
 
The maternal component is formed by the decidualization of the endometrium.
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:'''Links:''' [[Implantation]] | [[Placenta Development]]
  
 
Image Source: UNSW Embryology, no reproduction without permission. [http://embryology.med.unsw.edu.au/Notes/placenta.htm Placenta Development]
 
Image Source: UNSW Embryology, no reproduction without permission. [http://embryology.med.unsw.edu.au/Notes/placenta.htm Placenta Development]
  
 
[[Category:Placenta]] [[Category:Histology]]
 
[[Category:Placenta]] [[Category:Histology]]

Revision as of 13:55, 9 May 2011

Placenta Anchoring Villi

Histological image showing the junctional region between the trophoblast shell of the conceptus and the maternal decidua.

In week 2, the trophoblast shell cells proliferate and form a syncitiotrophoblast and cytotrophoblast layer around he conceptus. Syncitiotrophoblast cells migrate into the uterine wall, forming maternal blood-filled spaces (lacunae).

Placentation begins once the conceptus begins to implant in the uterine wall and the placenta will have both a fetal and a maternal component. The fetal component begins as villi form. The fetal chorion will form two regions: smooth chorion (chorion laeve) and villous chorion (chorion frondosum).

The maternal component is formed by the decidualization of the endometrium.


Links: Implantation | Placenta Development

Image Source: UNSW Embryology, no reproduction without permission. Placenta Development

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Date/TimeThumbnailDimensionsUserComment
current14:37, 3 August 2009Thumbnail for version as of 14:37, 3 August 2009600 × 450 (167 KB)MarkHill (talk | contribs)Placenta anchoring villi Histological image showing the junctional region between the trophoblast shell of the conceptus and the maternal decidua. In week 2, the trophoblast shell cells proliferate and form a syncitiotrophoblast and cytotrophoblast lay