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The Endowment for Human Development
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Playlist: Heart in Action

Hand Plates and Cartilage

#027, Movie 1 of 9

5 weeks, 6 days

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Script:

Also by 5 weeks, the embryo develops hand plates, and cartilage formation begins by 5 1/2 weeks.

Here we see the left hand plate and wrist at 5 weeks and 6 days.
From The Biology of Prenatal Development.Buy Now
    All ages referenced to fertilization, not last menstrual period.
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