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Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?

1. Chorion
2. Allantois
3. Yolk sac
4. Amnion

Correct answer: Amnion

Solution

The amnion encloses the embryo in amniotic fluid, which cushions it and prevents drying out. This makes it the membrane responsible for preventing desiccation inside the uterus.

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