umm embryo??
The fluid-filled sac that covers the yolk in an egg is called the vitelline membrane. It acts as a protective layer and helps to maintain the yolk's shape and position within the egg.
a vacuole
Amniotic sac
It's a vacuole.
Amnion
The amniotic sac is the membranous fluid filled bubble in which the developing foetus is suspended in utero.
A closed sac with fluid in it
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.
Amnion is the membrane that covers the embryo. Chorion is the membrane that covers the amnion, the yolk sac, and the allantois. The space delimited by the chorion and the amnion is called amniotic cavity and it is filled with aminiotic fluid. The amniotic cavity has the functions of preventing desiccation of the embryo and of protecting it against mechanical shocks.
Amniotic sac
its amniotic sac filled with amniotic fluid
the fetus is in the yolk sac
an amnion
a vacuole
Amniotic sac
it is the amneotic fluid.
It's a vacuole.
Amnion