What is Endotheliochorial placenta?
What is Endotheliochorial placenta?
Endotheliochorial placentas occur in orders from all four major clades of eutherian mammal. The endotheliochorial placenta as a definitive form has an interhemal area consisting of maternal endothelium, interstitial lamina, trophoblast, individual or conjoint basal laminas, and fetal endothelium.
What do you mean by Deciduate placenta?
A placenta whose maternal part is shed with delivery.
Why is the placenta called Hemochorial?
Human placenta is called as haemochorial type because it is in direct contact with the fetus or chorion. The fetus receives blood supply, nutrients and oxygen from the placenta as well as the waste is also removed through the placenta.
Where is chorion located?
yolk sac
The chorion is the outermost fetal membrane around the embryo in mammals, birds and reptiles (amniotes). It develops from an outer fold on the surface of the yolk sac, which lies outside the zona pellucida (in mammals), known as the vitelline membrane in other animals.
What are the four types of placenta?
Summary of Species Differences in Placental Architecture
| Type of Placenta | Common Examples |
|---|---|
| Diffuse, epitheliochorial | Horses and pigs |
| Cotyledonary, epitheliochorial | Ruminants (cattle, sheep, goats, deer) |
| Zonary, endotheliochorial | Carnivores (dog, cat, ferret) |
| Discoid, hemochorial | Humans, apes, monkeys and rodents |
What is Deciduate placenta example?
For example, the epitheliochorial placenta of some marsupials, swine, tapirs, cetaceans, camels, horses, and lemurs consists of villi and crypts that are covered with epithelium which survives throughout pregnancy. When the afterbirth is expelled, the villi are readily drawn out of the crypts.
What do the word labyrinthine mean?
Definition of labyrinthine 1 : of, relating to, or resembling a labyrinth : intricate, involved. 2 : of, relating to, affecting, or originating in the internal ear labyrinthine lesions.
What is Cytotrophoblast and Syncytiotrophoblast?
The syncytiotrophoblast is a rapidly growing multinucleated mass, which invades and ruptures endometrial capillaries forming lacunae. The cytotrophoblast is a layer of mononucleated cells, which invades the syncytiotrophoblast matrix and forms early chorionic villi.
What is Hemochorial?
: having the fetal epithelium bathed in maternal blood humans are hemochorial.
