The Blastoderm in Chicks During Early Gastrulation

By: Chinami Michaels
Published: 2014-02-26

This image shows a chicken (Gallus gallus) embryo undergoing gastrulation in stage four (18-19 hrs after laying) according to the Hamburger-Hamilton staging series. At this point in time the chicken embryo is a blastoderm (shown in blue). The first magnification of the embryo shows that the blastoderm cell layers have thickened to form the primitive streak and Hensen's node. The primitive streak extends from the posterior (P) region to the anterior (A) region. The second rectangular magnification shows the blastoderm cross-sectioned through the primitive streak. The cross-section shows the blastoderm's two cell layers, the epiblast and the hypoblast. The fluid filled cavity between the two cell layers is the blastocoel. The space left between the hypoblast cell layer and the yolk is called the subgerminal cavity.


Keywords

How to cite

Michaels, Chinami, "The Blastoderm in Chicks During Early Gastrulation". Embryo Project Encyclopedia ( ). ISSN: 1940-5030 https://hdl.handle.net/10776/7561

Publisher

Arizona State University. School of Life Sciences. Center for Biology and Society. Embryo Project Encyclopedia.

Last modified

Tuesday, September 12, 2023 - 08:59

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