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11-04-2019
Biology

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What three membranes make up the placenta

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josiebricker807 josiebricker807

15-04-2019

Answer:

he innermost placental layer surrounding the fetus is called the amnion. The allantois is the middle layer of the placenta (derived from the embryonic hindgut); blood vessels originating from the umbilicus traverse this membrane.

Explanation:

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