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Long slender projection of a cytotrophoblast cell

High power TEM of stage 4 embryo in vitro. Measuring bar = 0.5 µm. CTr, cytotrophoblast cell; Ep, epiblast cell; N, nucleus of epiblast cell. Notice the long slender projection of the cytotrophoblast cell (arrows) that invaginates the plasmalemma of the epiblast cell near its nucleus.

From: Lindenberg et al., 1986. Reproduced with permission of the publisher, Oxford University Press.

Keywords: cytotrophoblast cell, epiblast, nucleus, plasmalemma, projection of a cytotrophoblast cell, stage 4 embryo

Source: The Virtual Human Embryo.