But velamentous cord insertion is a complication in which the umbilical cord doesn’t insert into the placenta properly. “Velamentous cord insertion refers to the umbilical cord inserting into the ...

The chorion has three layers: cytotrophoblastic, chorionic connective tissue, and basement membrane. The chorion lies closest to the placenta. The chorionic sac encompasses the fetus and the ...

Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike ...