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no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.

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12y ago

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What viruses play a critical part in the formation of the placenta in humans?

None.


Do all humans have belly bottons?

The belly button is a must for all humans, as the placenta and umbilical cord are needed to feed the fetus. It is cut at delivery.


Why can't humans lay eggs?

Humans are placental mammals, meaning that they develop with the embryo attached to a placenta that allows it to exchange waste and nutrients with the mother. The placenta would not be able to function inside an egg.


What foods contain placenta?

it depends upon to which placenta your are referring if you are talking about the placenta of humans or mammals, none that i am aware in normal practice. however it is done occasionally, but not in something you would purchase. you could eat placenta without harm, but you would have to harvest it and prepare it yourself referring to plants - the membrane surround the seeds of a plant is also known as placenta , in that usage, legumes, peppers, and others where the entire fruiting body is consumed you would be eating placenta from the wikipedia - Capsaicin is present in large quantities in the placental tissue (which holds the seeds), ...


What is the medical term meaning abnormal implantation of the placenta?

Placenta previa, placenta accreta, placenta increta, and placenta increta are all conditions stemming from abnormal implantation of the placenta.


Why are the car and man identified as being placental mammals?

The car has nothing to do with it. Humans are placental mammals because every fetus has a placenta.


Do cats have a placenta?

Placenta comes out after each kitten.


To which structure does the umbilical cord connect the embryo?

The umbilical cord is attached to the placenta and the placenta is attached to the wall of the uterus


Can the placenta move during pregnancy?

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.


Do kangaroos have a placenta?

Yes kangaroos have a placenta.


What is displaced placenta called?

Placenta Previa


Is placenta a radioactive waste?

No, the placenta (afterbirth) is not radioactive. It is medical waste and potentially infectious to humans if not contained and properly destroyed.========================================================In some cultures, women believe that it is healthy and natural to cook and eat their placenta, a practice known as placentophagy. In China and Hong Kong, placentas are used in health products and medicine. In other cultures it is believed that interaction with the disposed placenta can positively affect the parents' future fertility (Japan, Transylvania). The Nigerian Ibo Tribe view the placenta as the dead twin of the new-born baby, and conduct full funeral rites for it.