In human embryos, the yolk sac is important because it

Name: In human embryos, the yolk sac is important because it
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The yolk sac in human embryos serves as the site where the earliest blood cells and blood vessels arise. It also contributes to the formation of the digestive tract, and helps in absorbing nutrients from the yolk. However, it does not store yolk or nitrogenous wastes, nor does it allow for gas exchange through the placenta.

In Human Embryos, the Yolk Sac Is Important Because It