Biology, 29.07.2019 07:30 ernestinebell3514
By the time the fertilized human reaches the uterus, the rapidly dividing ball of cells, now known as a blastocyst, has separated into two sections. the inner group of cells will become the embryo. the outer group will become the cells that nourish and protect it. on contact, it will burrow into the uterine wall for nourishment. this process is called
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By the time the fertilized human reaches the uterus, the rapidly dividing ball of cells, now known a...
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