The exchange of nutrients and gases between a developing human embryo and its mother occurs between circulatory fluids located within the 1) umbilical cord 3) manmary glands 2) placenta 4) yolk

The exchange of nutrients and gases between a developing

human embryo and its mother occurs between circulatory
fluids located within the
1) umbilical cord
3) manmary glands
2) placenta
4) yolk

1 Answer

The exchange of nutrients and gases between a developing human embryo and its mother occurs between circulatory fluids located within the 1) umbilical cord 3) manmary glands 2) …

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