High power TEM of a section of a stage 2, 2-cell embryo in vivo (original magnification x18,750). Notice two rudimentary desmosomes (arrow).
M = mitochondrion
From: Pereda and Croxatto, 1992. Reproduced with permission of the Annals, Academy of Medicine, Singapore.
Keywords: desmosome, stage 2 embryo, two-cell embryo
Source: The Virtual Human Embryo.