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.
Amnion chorion yolksac allantois
Amniotic membrane or amniotic sac, containing the embryo and amniotic fluid.
The cotyledon protects the embryo
Embryo forms new plant after development .
After cleavage a zygote forms embryo until it is born or hatched .
Amnion chorion yolksac allantois
Placenta.
Placenta.
Placenta.
Placenta (Apex)
Amniotic membrane or amniotic sac, containing the embryo and amniotic fluid.
The cotyledon protects the embryo
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Embryo forms new plant after development .
After cleavage a zygote forms embryo until it is born or hatched .
The ozone forms a protective layer. It is present as ozone layer.
allantois