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Ayeaye Ayeaye
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8 years ago
Which of the following is an accurate description of the placenta?
a.   It is a platelike mass of cells protecting the heart.
b.   It is fully developed by two weeks after conception.
c.   It serves as heart and lungs for the embryo.
d.   It is connected to the embryo's circulatory system through the umbilical cord.
e.   It develops during the germinal stage.
Textbook 
The Developing Child

The Developing Child


Edition: 13th
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danielle2018danielle2018
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8 years ago
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Ayeaye Author
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#2
8 years ago
Fantastic.

Thanks so much
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#3
8 years ago
My research paid off!
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