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The Endowment for Human Development
The Endowment for Human Development
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The Folding of the Embryo


3 weeks

From The Biology of Prenatal Development.Buy Now

Script: Entre 3 et 4 semaines, le plan corporel a pris forme et le cerveau, la moelle épinière, et le cœur de l'embryon sont facilement reconnaissables le long de la vésicule ombilicale.

La croissance rapide produit le repli de l'embryon relativement plat. Ce processus incorpore une partie de la vésicule ombilicale dans la membrane intérieure du système digestif et forme les cavités pulmonaire et abdominale de l'être humain en développement.

4 SEMAINES

All ages referenced to fertilization, not last menstrual period.
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