Reptiles were the first group whose eggs cushioned the embryo in fluid and protected it with membranes and a shell. This prevents eggs from drying out and allows them to be laid away from water.
The protective sac surrounding the embryo is formed by the amniotic membrane and the amniotic fluid which together create the amniotic sac. This sac serves to cushion and protect the developing embryo during pregnancy.
The membrane that encloses the embryo is called the amnion. Its function is to protect the embryo by providing a cushion against physical impact, preventing drying out, and allowing for movement and growth within a fluid-filled environment.
Its primary job - is to cushion and protect the developing embryo against damage while its growing.
The outermost layer of two membranes surrounding the embryo is the amnion. The two membranes are the amnion and the chorion, which together form the amniotic sac that surrounds and protects the developing embryo.
The Amniotic Membrane.
The fluid-filled bag of thin tissue that develops around the embryo is called the amniotic sac. It helps protect and cushion the developing embryo/fetus during pregnancy.
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Amniotic fluid serves as an insulator for the embryo as it provides a protective cushion and helps regulate temperature.
amniotic sac
The extraembryonic membrane that forms a fluid-filled sac is the amnion. It helps protect and cushion the developing embryo by surrounding it with amniotic fluid.
A type of egg is composed of a protective shell and membranes that surround the developing embryo is an egg
The yolk of an egg cell contains food storage tissue, which provides nutrients for the developing embryo. The egg white, or albumen, contains a sticky fluid that helps cushion and protect the developing embryo.