4 ч 22 мин, 9 окт 2002 г. - Placenta stage
Описание:
The placenta functions as a organ with two components: the fetal placenta which develops from the same blastocyst that forms the fetus, and the maternal placenta.these both give the organisim the nutrints it needs
Добавлено на ленту времени:
Aiden Allen Bardelmeier Growth and development timeline
Дата:
Изображения:
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