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The Endowment for Human Development
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Blood Cells and Bone Marrow


3 months, 3 weeks

From The Biology of Prenatal Development.Buy Now

Script: Innen 15 uker, kommer stamceller som sørger for dannelse av blod og mangedobler i beinmargen. Mesteparten av blodcelledannelse skjer her.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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