What is the difference between amnion and chorion, Biology

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What is the difference between amnion and chorion?

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 known as amniotic cavity and it is filled with aminiotic fluid. The amniotic cavity has the functions of stop desiccation of the embryo and of protecting it against mechanical shocks.

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