Very high power TEM of a portion of the nucleus (N) of an epiblast cell of a stage 3 embryo in vitro, 145-170 hours post-insemination (original magnification x27,200). The rough endoplasmic reticulum (RER) is continuous with the outer nuclear membrane.
From: Lopata et al., 1982. Reproduced with permission of the publisher, John Wiley & Sons.
Keywords: nuclear membrane, nucleus of epiblast cell, rough endoplasmic reticulum
Source: The Virtual Human Embryo.