Very high power TEM of part of a blastomere of a stage 2, 2-cell embryo in vivo, (original magnification x30,000). Shown are the nuclear membrane (arrows), nucleolus (Nl) within the nucleus and a mitochondrion (M) within the cytoplasm.
From: Pereda and Croxatto, 1992. Reproduced with permission of the Annals, Academy of Medicine, Singapore.
Keywords: cytoplasm, nuclear membrane, nucleolus, nucleus, stage 2 embryo, two-cell embryo
Source: The Virtual Human Embryo.