4 h 22 m, 9 oct 2002 año - Placenta stage
Descripción:
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 needsAñadido al timeline:
fecha:
4 h 22 m, 9 oct 2002 año
Ahora mismo
~ 23 years ago