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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 las semanas 3 y 4, emerge el plano del cuerpo y se pueden identificar fácilmente el cerebro, la médula espinal y el corazón del embrión junto al saco vitelino.

El rápido crecimiento produce un doblez del relativamente plano embrión. Este proceso incorpora parte del saco vitelino en el revestimiento del aparato digestivo y forma las cavidades del pecho y el abdomen del ser humano en desarrollo.

4 SEMANAS

All ages referenced to fertilization, not last menstrual period.
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