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Atlas of Human Embryos Chapter   Figure

amnion, amniotic cavity, embryonic disc, embryonic endoderm, epiblast, exocoelomic (Heuser's) membrane, extra-embryonic endoderm, extra-embryonic mesoblast, secondary umbilical vesicle cavity

A closer view of the embryonic disc in the same section as for Section 1.

The 13-day embryo with secondary villi (early trilaminar blastocyst)
Stage 6
Age 13 days
Carnegie collection 7801

Heuser et al., 1945.


Keywords: amnion, amniotic cavity, embryonic disc, embryonic endoderm, epiblast, exocoelomic (Heuser's) membrane, extra-embryonic endoderm, extra-embryonic mesoblast, secondary umbilical vesicle cavity

Source: Atlas of Human Embryos.