Fig. 44. TEM of a blastomere of a stage 2, 8-cell embryo in vitro (original magnification x7,000) 72 hours post-insemination. The cytoplasm contains mitochondria which are less dense than those in earlier embryos. The nucleus has clumps of heterochromatin and a reticular nucleolus.
G, juxtanuclear Golgi complex; M, mitochondria; V, vacuole.
(From: Sathananthan, Wood, and Leeton, 1982. Reproduced with permission of the publisher, Elsevier.)
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