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The Endowment for Human Development
The Endowment for Human Development
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Slideshow: Facial Expressions

Left Hand and Vital Organs

#98, Slide 2 of 31

6 weeks, 6 days

From The Biology of Prenatal Development.Buy Now


The process of progressive notching between digital rays, which allows the individual digits to emerge, is accomplished through the planned death of the cells in this region. This process of programmed cell death is called apoptosis.

Label Key:

1. forehead
2. nasal prominence
3. heart
4. liver
5. marginal vein
6. notching
7. left eye
8. left wrist
9. left hand
10. digital rays
All ages referenced to fertilization, not last menstrual period.
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