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Title: Blood flow in the placenta : Post by: Alex dope on Jan 21, 2018 Blood flow in the placenta
A) freely travels between mother and embryo as part of one circulatory system. B) is blocked, keeping the embryo isolated from the mother's body. C) is a potential cause of miscarriage. D) allows certain substances to pass through the placenta, even though mother and embryo's circulatory systems do not mix. Title: Blood flow in the placenta : Post by: kadu31 on Jan 21, 2018 Content hidden
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