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Detail of mitochondrion in a 7-cell embryo

Very high power TEM of a section of a blastomere of a stage 2, 7-cell embryo in vivo (original magnification x40,000). The mitochondrion (M) has perpendicular cristae and is closely related to small vesicles (V) of the smooth endoplasmic reticulum.

From: Pereda and Croxatto, 1992. Reproduced with permission of the Annals, Academy of Medicine, Singapore.

Keywords: blastomere, cristae, perpendicular cristae, seven-cell embryo, smooth endoplasmic reticulum, stage 2 embryo, vesicles

Source: The Virtual Human Embryo.