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Do some mammals have yolk sacs?

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Anonymous

14y ago
Updated: 8/18/2019

Yes, mammals have yolk sacs. Although they may not be as easily noticeable as the yolk in a chicken egg, it is still there. The yolk contains proteins and fats needed for the embryos further development.

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Wiki User

14y ago

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Can you be Pregnant with three yolk sac what does that mean?

three yolk sacs means three babies.


If you have twins in separate yolk sacs is this good?

yes


What does two yolk sacs mean?

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Some babies live off a mucus the mother excretes or secretes, some babies are born with their own yolk sacs, and many are just on their own from birth.


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The allantois, yolk sac and part of chorion.


Why are some chicks hatched with their yolk sac stil attached?

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Why do mammals have small eggs compared to birds?

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What part of the chicken egg acts as placenta in mammals?

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Do bullfrogs have amnion sacs?

No, bullfrogs do not have amnion sacs. They are amphibians, and their reproductive process involves laying eggs in water, where the eggs develop into tadpoles. Amnion sacs are characteristic of amniotes, such as reptiles, birds, and mammals, which develop their embryos in a protective environment outside of water.


Why is there no large yolk in a mammal embryo?

Mammal embryos don't require a large yolk becaues they are nourished directly by the mothers body. In contrast, birds, reptiles, and other (mostly) egg layers, need a large yolk because the yolk must nourish the embryo all the way through development.


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A yolk is to a bird as a what is to a mammal?

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