A reconstruction of half of the 12-day embryo (7700) showing its internal features and its relation to maternal sinusoids and a uterine gland.
Keywords: amniotic cavity, embryonic disc, embryonic ectoderm, epiblast, exocoelomic (Heuser's) membrane, extra-embryonic mesoblast, fibrous coagulum, primary umbilical vesicle cavity, primary yolk sac cavity (exocoelom), sinusoid, trophoblast lacunae, trophoblastic layer, uterine gland
Source: Atlas of Human Embryos.