The placenta provides a site for maternal and fetal blood to thoroughly mix to allow O₂ and nutrients to be delivered to the fetus and CO₂ and other waste products to be removed from the fetus.

Question

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The placenta acts as a barrier and exchange site where maternal and fetal blood do not mix; instead, nutrients and gases are exchanged through diffusion across the placental membrane.

The Placenta Provides a Site for Maternal and Fetal Blood