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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: 심장은 보통 1분에 약 113번 박동한다

한 번 박동할 때마다 혈액이 심방에 들어가고 나감에 따라 심장의 색이 변한다

출생 전에 심장은 대략 5천 4백만 번을 박동하고 80년의 수명 동안 32억 번 이상 박동한다

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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