This following link should help answer your question:
http://www.nhsdirect.nhs.uk/articles/article.aspx?articleId=2309 the purpose of a placenta is to clean out all of the exess poop left inside of your bum, its job is to cleanse it out and turn it into nutrients for your baby so it can survive when not being fed.
The placenta being attached to both the mother and the fetus, provide important benefits, such as supplying nutrients to the fetus, eliminating waste, and gas exchange.
Prevents damage to pregnant mares & placenta.
It has the same purpose as all other placental pregnancies, it carries nutrients to the fetus from the mother.
Placenta previa, placenta accreta, placenta increta, and placenta increta are all conditions stemming from abnormal implantation of the placenta.
Placenta comes out after each kitten.
The umbilical cord is attached to the placenta and the placenta is attached to the wall of the uterus
Yes. But the movement is relative. Placenta does not change the position. But lower placenta may move up. So that placenta previa may become normal placenta.
Yes kangaroos have a placenta.
Placenta Previa
"Unremarkable placenta" means there was nothing special, different, or noteworthy about the placenta being examined.
The purpose of the umbilical cord in human development is to provide a connection between the developing fetus and the placenta, allowing for the exchange of nutrients, oxygen, and waste products between the fetus and the mother.
Placenta abruptio or placental abruption is abnormal separation of the placenta from the uterine wall.