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The Beating Heart

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From The Biology of Prenatal Development.

Note:

The beating heart is busy pumping blood and fills much of the chest. However, early lungs are growing quietly and inconspicuously on both sides of the chest.

Label Key:

1. chest wall

2. brain

3. heart

4. liver

All ages referenced to fertilization, not last menstrual period.

Yolk Sac and Vitelline Vessels

Yolk Sac

The Beating Heart

Hand Plate and Vital Organs

Left Hand Plate and Wrist

Brain and Umbilical Cord

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Image Gallery

The Beating Heart

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5 weeks, 6 days

Note:

Label Key: