Saturday, December 11, 2004

Human Embryology, Amnion

A cleft separates the outermost cells of the inner cell mass of the blastocyst from the remainder, which then becomes the embryonic disk (Figure 1G). The split-off, thin upper layer is the amnion, which remains attached to the periphery of the embryonic disk. As the disk folds into a cylindrical embryo, the amniotic margin follows the underfolding,


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