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The Endowment for Human Development
The Endowment for Human Development
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The Heart in Action


4 weeks, 4 days

From The Biology of Prenatal Development.Buy Now

Script: 通常1 分間に113 回の 心拍数があります

血液が心室に出入りすると 心臓の色が変化することに 気づきましたか

心臓は 出生前に およそ5,400 万回も脈打ち 約80 年という一生を通じて 32 億回もの心拍数があります

All ages referenced to fertilization, not last menstrual period.
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Body Cavity Formation
Body Cavity Formation
Amniotic Fluid
Amniotic Fluid
The Heart in Action
The Heart in Action
The Limbs Bud
The Limbs Bud
Transparent Skin
Transparent Skin
Cerebral Hemispheres
Cerebral Hemispheres
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