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Blood Cells and Bone Marrow


3 months, 3 weeks

From The Biology of Prenatal Development.Buy Now

Script: وبنهاية 15 أسبوعاً، تظهر الخلايا الجذعية التي تُكَوِّن الدم وتتكاثر في نِقْي العَظْم. ويحدث هنا معظم عمليات تكون خلايا الدم.

All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
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Blood Cells and Bone Marrow
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