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The Heart
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6 weeks, 6 days
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From
The Biology of Prenatal Development
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Label Key:
1. right ventricle
2. liver
3. left ventricle
All ages referenced to fertilization, not last menstrual period.
Close-up, Seven-Week Heart
The Four-Chambered Heart
The Heart
The Heart and Chest
The Hand, Chest, and Liver
The Circulation of the Hand
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