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The protective sac around the embryo or fetus is the amniotic sac.
Embryo
The Amniotic Sac
no
Endosperm
Embryos are located in the embryo sac of the ovary.
the amnion
its the ovary
The membrane that forms a sac around an animal embryo is called the amniotic sac. The embryonic sac is a bag of fluid inside of a woman's womb where the unborn baby develops and grows.
The amniotic sac is the sac in which the fetus develops in amniotes. Its wall is the amnion, the inner of the two fetal membranes. It encloses the amniotic cavity and the embryo.
No, the embryo (assuming it is a vertebrate animal) has a backbone...the yolk sac does not.