4 St. 22 Min, 9 Okt 2002 Jahr - Placenta stage
Beschreibung:
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
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4 St. 22 Min, 9 Okt 2002 Jahr
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~ 23 years ago
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