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FETAL MEMBRANES Placenta Nutrition

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Yolk sac<br />

<br />

<br />

<br />

<br />

Transfer and metabolism of nutrients – as<br />

liver<br />

Development of blood cells and vessels<br />

-vitelline vascular system<br />

Participation on formation of primitive<br />

gut<br />

Primordial gamets in endoderm of yolk<br />

sac during 3 rd week

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