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Blood Formation in Liver


6 weeks, 6 days

From The Biology of Prenatal Development.Buy Now

Script: By 6 weeks, blood cell formation is underway in the liver where lymphocytes are now present. This type of white blood cell is a key part of the developing immune system.

The diaphragm, the primary muscle used in breathing, is largely formed by 6 weeks.

All ages referenced to fertilization, not last menstrual period.
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