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Blood Cells and Bone Marrow

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From The Biology of Prenatal Development.

Script: Setelah 15 minggu, muncul sel batang pembentuk darah dan berlipat ganda di dalam tulang sumsum. Kebanyakan pembentukan sel darah akan terjadi di sini.

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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Blood Cells and Bone Marrow

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3 months, 3 weeks