Which of the following is the correct pairing of the extraembryonic membrane and its function?
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Correct Answer: D. allantois – participates in gas exchange.
The yolk sac provides food for the growing embryo, especially true with birds. The amnion forms the fluid filled sac that provides for cushion and protection to the embryo. The chorion is the outermost membrane, encasing the other extraembryonic membranes. Only answer option D is correctly paired.
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