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The placenta is for nourishing the embryo.
No. Turtles lay eggs. Only mammals have a placenta.
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.
No, only mammals have a placenta with umbilical chord.
Dolphins are mammals, give live birth, so also have a placenta.
No, tuna fish do not have placentas. The placenta is part of mammal physiology, and fish are not mammals.
no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.
it permits the passage of nutrients and oxygen from the mother to the fetus.
The young are nourished in the womb by the placenta.
In mammals through placenta and in reptiles and birds from yolk .
No, pouched mammals do not have placenta.
no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.