File:Placenta anchoring villi.jpg: Difference between revisions

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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.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	14:37, 3 August 2009		600 × 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

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@@ Line 12: / Line 12: @@
 :'''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.
 [[Category:Placenta]] [[Category:Histology]]