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no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.
Kyla Klocko
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∙ 13y agoOnly the females.
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Does the female dog lose a placenta after the birth?
Yes they do, all Placental mammals do.
Do turtles have placenta?
No. Turtles lay eggs. Only mammals have a placenta.
Does a squid have a placenta and an umbilical cord?
No, only mammals have a placenta with umbilical chord.
Do dolphions have placenta?
Dolphins are mammals, give live birth, so also have a placenta.
Do tuna have placenta?
No, tuna fish do not have placentas. The placenta is part of mammal physiology, and fish are not mammals.
What is the function of placental in mammals?
The placenta is for nourishing the embryo.
One characteristic of placental mammals?
The young are nourished in the womb by the placenta.
Is a placental mammal a pouched mammal?
No, pouched mammals do not have placenta.
Where does the embryo get nutrients from?
In mammals through placenta and in reptiles and birds from yolk .
Do humans have a placenta?
no they do not. Mammals are divided into three groups; monotremes, marsupials, and placental mammals.
What organ do pregnant monotremes and marsupials lack?
A complex placenta. Marsupials have a choriovitelline placenta, but it is not as well-developed as the placentas of placental mammals.
Where do most mammals grow before they're born?
Most mammals are placental mammals: they develop in a placenta before birth. Marsupials also develop in a placenta, but they are delivered much earlier and the placenta is less developed. Monotremes develop within an egg, which is kept inside the mother for some time before it is laid. It hatches several days later.
