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Biology, 03.03.2021 08:20 JellalFernandes

Which process normally occurs at the placenta? (1) Oxygen diffuses from fetal blood to maternal
blood.
(2) Materials are exchanged between fetal and
maternal blood.
(3) Maternal blood is converted into fetal blood.
(4) Digestive enzymes pass from maternal blood
to fetal blood.

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Answers: 3

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