The trophoblast of the implanted fertilized egg ultimately develops into the

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The trophoblast is the outer layer of cells that develops into the placenta, which is crucial for the exchange of nutrients and waste products between the mother and the developing fetus. The allantois is a membrane that helps with waste disposal and gas exchange, while the amniotic cavity is a fluid-filled sac that cushions and protects the growing embryo. The zona pellucida is a protective layer surrounding the egg before it implants in the uterus.

The Trophoblast of the Implanted Fertilized Egg Ultimately Develops into the