Question

Name a waste product that will pass from the fetus to the mother across the placenta.

Answer 1

It grows into the wall of the uterus and is joined to the foetus by the umbilical cord. The mother's blood does not mix with the foetus's blood, but theplacenta lets substances passbetween the two blood supplies: waste substances, such as carbon dioxide, diffuse across the placentafrom the foetus to the mother