Fig. 17. TEM of the junctional region of two trophoblast cells of a stage 3 embryo in vitro, 145-170 hours post-insemination (original magnification x18,000). Microvilli are highly developed in regions of intercellular junctional contact between trophoblast cells. On the surface facing the blastocystic cavity microvilli of adjacent cells curve toward one another froming arched interdigitations over the junctions.
BC, blastocystic cavity; L, lipid; Mv, microvilli; SC, sequestered cell.
(From: Lopata, Kohlman, and Kellow, 1982. Reproduced with permission of the publisher, John Wiley & Sons.)
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