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The Endowment for Human Development
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Kidneys Produce Urine


8 weeks, 1 day

From The Biology of Prenatal Development.Buy Now

Script: 這時,腎生產尿, 排泄到羊水中。

男性胚胎中, 發育的睾丸 開始生產和排出睾酮。

四肢的骨骼、 關節、肌肉、 神經和血管 與成年人的十分相似。

All ages referenced to fertilization, not last menstrual period.
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