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Yolk sac is then infiltrated with a system of blood vessels ... Eventually the free edges of the folds fuse and completely enclose the body of the embryo in the amniotic cavity. When the amniotic ...
Yolk sac is then infiltrated with a system of blood vessels ... Eventually the free edges of the folds fuse and completely enclose the body of the embryo in the amniotic cavity. When the amniotic ...
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