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Atlas of Human Embryos Chapter   Figure
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allantois, amnion, amniotic cavity, amniotic duct, cloacal membrane, connecting stalk, embryonic disc, embryonic ectoderm, embryonic endoderm, extra-embryonic coelom, extra-embryonic endoblast (exocoelomic membrane), extra-embryonic mesoblast, notochordal process, primitive node, primitive streak area, trophoblastic layer, umbilical vesicle cavity, umbilical vesicle roof

A view of the right half of the late trilaminar blastocyst (embryonic shield period) showing its relation to the surrounding trophoblastic layer, connecting stalk, amniotic and yolk sac cavities and allantois. The late trilaminar blastocyst with a notochordal process

Stage 7
Age 16 to 17 days
Carnegie collection 7802

Hertig and Rock, 1945.


Keywords: allantois, amnion, amniotic cavity, amniotic duct, cloacal membrane, connecting stalk, embryonic disc, embryonic ectoderm, embryonic endoderm, extra-embryonic coelom, extra-embryonic endoblast (exocoelomic membrane), extra-embryonic mesoblast, notochordal process, primitive node, primitive streak area, trophoblastic layer, umbilical vesicle cavity, umbilical vesicle roof

Source: Atlas of Human Embryos.