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Home Q & A Board Science-Related Homework Help Psychology Developmental Psychology
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Soren Soren
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9 years ago
From the __________, tiny __________ emerge, which burrow into the uterine wall and start to develop the placenta.
A)   amnion; veins
B)   chorion; villi 
C)   trophoblast; hairs
D)   embryonic disk; veins
Textbook 
Child Development

Child Development


Edition: 9th
Author:
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SuperionSuperion
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9 years ago
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Soren Author
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#2
9 years ago
It makes sense now. Thanks a thousand times over
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#3
9 years ago
It was nothing! Don't forget to mark the topic solved
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