CineThe Heart in Action |
| Compre ahoraDe La biología del desarrollo prenatal |
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Guión: The heart typically beats about 113 times per minute. Note how the heart changes color as blood enters and leaves its chambers with each beat. The heart will beat approximately 54 million times before birth and over 3.2 billion times over the course of an 80-year lifespan. |
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Todas las edades en referencia a la fecundación, no al último período menstrual.
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The Heart in Action
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The Limbs Bud
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Transparent Skin
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Cerebral Hemispheres
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The Yolk Sac
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The Liver and Heart
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