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The Endowment for Human Development
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Heart and Circulatory System


3 weeks

From The Biology of Prenatal Development.Buy Now

Script: Raha vao manomboka miseho ao amin'ny chorion ny cellules-ndrà voalohany, dia manomboka maka endrika ny lalan-drà manerana ny embryon, ary mipoitra ny tubular heart.

Avy hatrany ilay fo izay mitombo haingana dia miara-miorona ary manomboka miforona ny efitra tokan'ny fo.

Manomboka mitempo ny fo 3 herinandro sy 1 andro aorian'ny fampiraisana.

Ny système circulatoire no système voalohany amin'ny vatana, na antokona organes mihavana, izay mamita ny asany.

All ages referenced to fertilization, not last menstrual period.
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