Fig. 30. Very high power TEM of a hypoblast cell of a stage 3 embryo in vitro, 145-170 hours post-insemination (original magnification x30,600). Notice the nucleus (N), mitochondria (M), and dilated citernae (DC) of rough endoplasmic reticulum (RER) containing flocculent material.
(From: Lopata, Kohlman, and Kellow, 1982. Reproduced with permission of the publisher, John Wiley & Sons.)
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