12. Is there a exchange of
cells between the mother and
the fetus through the
placenta?

Gap-fill exercise

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Under normal conditions, there no
passage of cells the placenta
during gestation. placenta has a
smooth separating the richly
vascularized in contact with the
’s endometrium from the
umbilicalcord contactwith the fetal
blood. barrier is known as
barrier. Although permeable to
substances (selective permeability) the
barrier forbids the passage
cells.