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The Endowment for Human Development
The Endowment for Human Development
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To the Earth and Back


From The Biology of Prenatal Development.Buy Now

Script: 或者1米长。

假如我们能够把一个 成年人的100万亿个 细胞的脱氧核糖核酸 全部展开的话, 它会延展超过630亿哩。 这个距离是从地球到太阳往返 340次。

All ages referenced to fertilization, not last menstrual period.
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Ready for Birth
Ready for Birth
DNA
DNA
To the Earth and Back
To the Earth and Back
Fertilization 1
Fertilization 1
Fertilization 2
Fertilization 2
Cell Division
Cell Division
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