Question

what are amnion, chorion yolk sac and allantois

Answer 1

Vertebrates have four different extraembryonic membranes: thechorion, the allantois, the yolk sac, and the amnion. In vertebrates that lay eggs, the chorion is the outermost membrane and lines the inside of the eggshell. The allantois is a sac-like extraembryonic membrane that removes waste from the embryo.

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Answer 2

Answer:

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