What placenta is furnished by extraembryonic membtans?
Answers
Answer:
Classification of placenta is on the basis of histological (microscopic) structural organization and layers between fetal and maternal circulation.
Three main groups:
Haemochorial - placenta where the chorion comes in direct contact with maternal blood (human).
Endotheliochorial - maternal endometrial blood vessels are bare to their endothelium and these comes in contact with the chorion (dogs, cats).
Epitheliochorial - maternal epithelium of the uterus comes in contact with the chorion, considered as primitive (pigs, Template:Bovine).
The presence of these three differing types of placenta have also been used to describe the pattern mammalian evolution.
Explanation:
the placenta provides minerals and nutrients to the baby from the mother and help in removing the waste