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Amniotic Fluid
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Script: By 4 weeks the clear amnion surrounds the embryo in a fluid-filled sac. This sterile liquid, called amniotic fluid, provides the embryo with protection from injury. | ||
| All ages referenced to fertilization, not last menstrual period. |
Sections of the Brain
Body Cavity Formation
Amniotic Fluid
The Heart in Action
The Limbs Bud
Transparent Skin
