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03-05-2020
Biology

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What allows substances to pass back and forth between the placenta and the embryo?

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03-05-2020

Answer: the fetus.

Explanation: The fetus is connected to the placenta by a tube called the umbilical cord. The cord contains two arteries and a vein. Substances pass back and forth between the mother's and fetus's blood through the placenta and cord.

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03-05-2020

between the mother's and fetus blood through the placenta and cord

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