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15 h 29 m, 22 sept 2002 año - First Trimester: Embryo

Descripción:

By week 4 the actual embryo is now forming. Alone with the amnion and yolk sac. The amnion is necessary because it surrounds and protects the embryo. It will later on also have more use. The yolk sac produces blood for the embryo.

Añadido al timeline:

Growth and Development Timeline, Jacky Villanueva

ByJacqueline Villanueva
7 dic 2017

fecha:

15 h 29 m, 22 sept 2002 año
Ahora mismo
~ 21 years ago

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