Their main difference is how they form the daughter cells during cytokinesis. During that stage, animal cells form furrow or cleavage that gives way to formation of daughter cells.
The term for the premature separation of the highly vascular structure that acts as communication between the mother and the embryo is the placenta.
The Placenta develops in a woman's uterus during pregnancy. It helps provide the necessary nutrients and remove the needed waste from the baby's blood.