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the amnion
cellular differentiation
amniotic sac :)
by the ectoderm layer
Amniotic membrane or amniotic sac, containing the embryo and amniotic fluid.
It is a seed having an embryo (which will ultimately develop in to a plant), the cotyledone(s), endosperm and protective seed coat)
Placenta.
Placenta.
the amnion
The protective sac around the embryo or fetus is the amniotic sac.
its amnion
Both
Hyaline cartilage is the forerunner of long bones in the embryo.
the roots
Placenta.
Placenta.
cellular differentiation