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Surface view of implantation site

Surface view of the implantation site, photographed under liquid. The dark ring indicates the chorionic cavity. The opaque area within the ring represents the embryonic mass, that outside the ring represents the trophoblast. The mouths of the endometrial glands appear as dark spots.

Fig. 3. O'Rahilly and Müller, 1987.

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Keywords: chorionic cavity, embryonic mass, endometrial gland, implantation site, mouths of endometrial glands, trophoblast

Source: The Virtual Human Embryo.