Explore BrainMass

Histological relations

List and describe 5 histological relations found between the fetal and maternal components of various mammalian placentae. Please be as detailed as you can be. Thank you!

Solution Preview

A. In all higher mammals,the minute fertilized eggs are retained longer in the uterus which becomes modified for their reception and nourishment by the development of a placenta. The placenta has two components: 1. A fetal portion formed by the chronion frondosum, and the 2. a maternal portion formed by the desidua basalis. On the the fetal side, the placenta is bordered by the chorionic plate, and on its maternal side, by the desidua basalis, of which the compact layer or the decidual plate is most ...