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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: Ang puso ay karaniwang tumitibok ng halos 113 beses kada minuto.

Tingnan kung paano nagbabago ng kulay ang puso habang pumapasok, lumalabas ang dugo sa mga lugar nito sa bawat tibok.

Ang puso ay titibok ng humigit-kumulang na 54 milyon beses bago ang pagsilang at mahigit 3.2 bilyon beses sa 80-taong buhay.

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
Free resources and training for educators
Buy the Biology of Prenatal Development DVD


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