skylarnelson707 skylarnelson707

27-08-2019
Biology

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The outer cells of a blastocyst become the , an organ that offers protection and nourishment. Once the blastocyst has implanted in the uterus, it is called an . After eight more weeks of development, it is called a .

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anaiyahwinkfield90 anaiyahwinkfield90

27-08-2019

Answer:

The outer cells of a blastocyst become the placenta, an organ that offers protection and nourishment. Once the blastocyst has implanted in the uterus, it is called an embryo. After eight more weeks of development, it is called a fetus.

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15-11-2019

Answer:placenta, embryo, fetus

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