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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: Srdce obvykle bije asi 113-krát za minútu.

Všimnite si, ako srdce mení farbu, keď krv vteká a vyteká z komôr pri každom údere.

Srdce bude biť približne 54 miliónkrát pred narodením a viac než 3,2 miliárd krát počas 80-tich rokov priemerného života.

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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