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Blood Cells and Bone Marrow


3 months, 3 weeks

From The Biology of Prenatal Development.Buy Now

Script: 15 週までには 血液を 形成する幹細胞が達して 骨髄内で増殖します 殆どの血球形成は ここで行われます

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