How is the yolk sac formed what is the function of the yolk, Ask an Expert

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How is the yolk sac formed? What is the function of the yolk sac?

The yolk sac is formed from the covering of the vitellus by some cells originated from the primitive gut.

The yolk sac stores vitellus, the main nourishment source of non-placental embryos.

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Category:- Biology
Reference No.:- M9571633

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