the amnion
Amnion chorion yolksac allantois
an amnion
amniotic sac :)
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.
The cotyledon protects the embryo
Amnion chorion yolksac allantois
The protective sac around the embryo or fetus is the amniotic sac.
trophoblast cells i.e the outer cells of blastocyst(1st embryonic stage in man) gives rise to amnion chorion allantois and yolk sac the 4 protective layer of embryo and inner cells called embryoblast gives rise to embryo
an amnion
its amnion
There is no such thing as an "ovarian sac". The amnion is a membrane building the "amniotic sac" that surrounds and protects an embryo.
amniotic sac :)
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.
The cotyledon protects the embryo
Amniotic membrane or amniotic sac, containing the embryo and amniotic fluid.
no
The inner most membrane is the fluid filled amniotic sac, next is the yolk sac, where the first blood cell originates. The allantois forms near the yolk sac, while the chorion surrounds all the other ones.