Skip Navigation
Stage 1 / 1 day Stage 2 / 2-3 days Stage 3-1 / 4 days Stage 3-2 / 4-5 days Stage 4 / 6 days Stage 5a-1 / 7 days Stage 5a-2 / 8 days Stage 5b / 9 days Stage 5c / 12 days Stage 6 / 13-17 days Stage 7 / 16-19 days Stage 8 / 23 days Stage 9 / 25 days Stage 10 / 28 days Stage 11 / 29 days Stage 12 / 30 days Stage 13 / 32 days Stage 14 / 33 days Stage 15 / 36 days Stage 16 / 39 days Stage 17 / 41 days Stage 18 / 44 days Stage 19 / 45-47 days Stage 20 / 49 days Stage 21 / 49-52 days Stage 22 / 52-55 days Stage 23 / 56 days
Carnegie Stage   Figure

Details of the contact zone

Details of the contact zone

High power TEM of a stage 4 embryo in vitro showing details of the contact zone between the endometrial cells (EC) and a cytotrophoblast cell (CTr). Measuring bar = 0.5 µm . The plasmalemma of the endometrial cells exhibit many invaginations (arrows) where it is adjacent to the cytotrophoblast cell protrusions. The endometrial cells have a Golgi complex (G), mitochondria (M), well-developed rough endoplasmic reticulum (RER), and an electron-dense matrix.

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

Click on the picture to view the full-sized image.


Keywords: Golgi complex, contact area(s), cytotrophoblast cell, cytotrophoblast cell protrusions, electron-dense matrix, endometrial cells, mitochondria, plasmalemma, rough endoplasmic reticulum


Source: The Virtual Human Embryo.