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Home Q & A Board Science-Related Homework Help Psychology Developmental Psychology
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Maxsis Maxsis
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6 years ago
The yolk sac __________.
A) forms during the third trimester of pregnancy
B) is the outer ring of cells that surrounds the blastocyst
C) produces blood cells until the organs are mature enough to take over this function
D) contains one large vein that delivers blood loaded with nutrients and two arteries that remove waste
Textbook 
Development Through the Lifespan

Development Through the Lifespan


Edition: 7th
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la_sikaria_lsla_sikaria_ls
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6 years ago
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Maxsis Author
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6 years ago
Just got PERFECT on my quiz
nsak
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This site is awesome
deathwing
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You make an excellent tutor!
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