Early Embryogenesis Placenta Formation and Twinning

Which structure handles elimination of wastes and gas exchange for the developing fetus?

What is in the umbilical cord?

The umbilical vein carries _______________ blood from the _____________ to the ________________

The umbilical arteries carry ______________ blood from the ______________ to the _______________

Where does the placenta come from?

Blood supplies of mother and embryo do/do not mix

What is placenta previa?

Where is the placenta normally located?

Monozygotic twins splitting occurs usually at the _____________ stage

Monozygotic twins normally have their own __________________ but share _______________

Splitting events in the _______________ may lead to conjoined twins