cathy430
cathy430 cathy430
  • 22-11-2020
  • Health
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The mother's blood supply and the embryo's blood supply
A. Always flow together
B. Mix in the umbilical cord
C. Sometimes flow together
D. Are kept separate

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sbxbrh4wqf sbxbrh4wqf
  • 22-11-2020

Answer: the answer is C hope it helps

Explanation:

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